Investigation of Radio Frequency Breakdown in Fusion Experiments
|
|
- Edith Foster
- 5 years ago
- Views:
Transcription
1 Investigation of Radio Frequency Breakdown in Fusion Experiments T.P. Graves, S.J. Wukitch, I.H. Hutchinson MIT Plasma Science and Fusion Center APS-DPP October 2003 Albuquerque, NM
2 Outline Multipactor Basics Simple multipactor description Multipactor discharge properties Other types of multipactor discharges RF Breakdown Experiment Motivation behind experiment How multipactor discharges apply Experimental Results How this could apply to Fusion/Space systems Future Plans
3 Abstract An electron multipactor discharge is a resonant vacuum discharge which occurs in RF systems in the MHz to tens of GHz frequency range. This discharge can develop in systems such as microwave devices, RF satellite payloads, or accelerator structures. The RF Breakdown Experiment for Alcator-CMOD, designed to test high-voltage, RF arcing, appears to be limited by coaxial multipactoring within the vacuum system. The underlying physics and properties of multipactor discharges along with the experimental results of the RF Breakdown Experiment will be presented.
4 Multipactor Basics A multipactor discharge is a resonant condition for electrons Radio Frequency effect MHz to 10 s GHz frequencies Observed in: Accelerators Microwave devices and resonators RF satellite payloads Vacuum conditions required Electron multiplication from secondary electrons Need SEC > 1 and sufficient impact energy Copper SEC δ = 1.3, Energy = 600eV (peak), 200eV (min) (Handbook of Chemistry and Physics, 72 nd Edition) System geometry and E field structure R.A. Kishek, Phys. Plasmas 5, 2120 (1998)
5 Parallel Plate Multipactor T(0 to π) T(π to 2π ) T(2π to 3π) e - Secondary Electrons E 1 E 2 E 3 Secondary Electrons E max 0 E field wave E min
6 Multipactor Properties Parallel Plate (PP) Geometry Lorentz equation can be solved for multipactor condition: 4 m V = π ( f d ) 2 e Due to simple geometry, PP situation well studied More complicated due to secondary emission energy range Susceptibility Curve R.A. Kishek, Phys. Plasmas 5, 2120 (1998)
7 Other Multipactor Characteristics Advantages to Multipactor Discharges Surface conditioning Electron source (Farnsworth Oscillator) Plasma display technology Disadvantages Detunes microwave circuits, dissipating all excess power Typically impossible to push thru discharge Introduces large noise signals in space applications Surface heating Vacuum window breakage Induce vacuum breakdown (arcing)
8 Preventing Multipactoring Three General Approaches Surface conditioning Increases the necessary energy for secondary emission Low SEC Coatings Less secondary electrons, yet tend to wear off with time Change geometry Make geometry such that multipactoring is impossible
9 Other Multipactor Regimes Single Surface Dielectric Multipactor E dc V o E rf sin(ωt) Coaxial Transmission Line Multipactor Outer diameter Inner diameter E rf = E o sin( ω t) r
10 Coaxial Multipactoring Not well explored Space and Fusion applications have vacuum coaxial transmission lines Coaxial lines typically filled with insulator like SF 6 preventing multipactoring Result of non-linear behavior of electrons Single or double surface multipactoring Still need large enough impact energy for secondary emission Other Non-linear Multipactor Regimes Possible Other non-linear, non-uniform field geometries Influence of external magnetic fields in particle orbits R. Woo, J. Appl. Phys. 39, 1528 (1968)
11 RF Breakdown Experiment Motivation behind experiment Alcator C-MOD utilizes high power (MW) RF systems for ICRH (~80MHz) Empirically determined E-field breakdown limit, E=15kV/cm, on C-MOD Similar limits seen on experiments such as JET and NSTX RF Breakdown Testbed was built to explore E-field limit High Q (~1500) resonator to build up high power (extremely sensitive to small changes) Transition to strip line at high voltage point to locate arcing Problems arose when circulating power levels were limited at surprisingly low voltage (~100V)
12 RF Breakdown Setup Source 4kW Pulsed ~ DC1 DC2 Double Stub Tuner Vacuum System Base pressure 10-7 torr, He Tested with and without Ground plane (suspected series arcs, redesign)
13 Amplifier Vacuum Break Directional Couplers Stub #1 Directional Couplers Stub #2
14 RF Short Vacuum Chamber Vacuum Break
15 Initial Power Limit Data Limit detected by rise in both reflected power to source (mismatch) and ion gauges (discharge cleaning surfaces) Seems to line up with parallel plate d=1.25 cm multipactor Problem no 1.25 cm gaps in system! Possible strange regime in square vacuum chamber? Possible Coaxial Multipactoring? Next step Achieve better vacuum (10-7 ) to increase necessary impact energy for secondary emission , No Ground Plane Present Base Pressure = 1e-5 torr (prebake)
16
17 Why the limit? Baked system 10-7 torr much less adsorbed gases Result: Small increase in limit voltage, but limit now completely independent of pressure Put ground plane back into system Changed voltage pattern completely inside box Result: Very small variation with/without ground plane Replaced quartz window with SS conflat checking for possible dielectric multipactoring Result: No variation with and without window Voltage in vacuum box not constant with frequency Seems that multipactor is not focused in the box
18 72.25 in 150 MHz 80 MHz Frequencies MHz 80 MHz CST Fieldscode,T.Graves, P. Koert
19 Coaxial Multipactor Regimes Each figure below corresponds to the experimentally determined that frequency E=8eV E=8eV E=22eV E=23eV J. Irby, T. Graves
20 Current Results Summary
21 Application to Fusion Systems Use of vacuum coaxial transmission lines J-port has 2 sections of 4 inch vacuum coaxial lines (as well as poor operation) Situation in plasma non-vacuum operation transmission of power Finite VSWR Can the voltage get low enough and the phasing be just right to initiate a multipactor in the proper region? ITER plans to have multi-wavelength long vacuum coaxial transmission lines for ICRH system
22 Conclusions Multipactor discharges are resonant electron discharges which effect many different RF systems Typical scaling is V ~ (f d) 2 and can occur in many different geometries including coaxial transmission line The RF Breakdown Experiment seems to be limited by what appears to be a coaxial multipactor and it is this might relate to the much higher voltage limit on C-MOD of 15kV/cm New information is needed to address the problem of coaxial multipactoring
23 Future Plans Is power limit definitely a multipactor effect? What is the electron impact energy? What mode (harmonic) is the multipactor? Where in the line is it occurring (high voltage point?) Move short outside vacuum region and determine location of multipactor Diagnostic inside coax to investigate multipactor electron potential and energy What happens when there is a net power out? Can you get multipactoring with a non-infinite VSWR - Attach load to resonator to look at VSWR scenario
Experimental Results of the Coaxial Multipactor Experiment. T.P. Graves, B. LaBombard, S.J. Wukitch, I.H. Hutchinson PSFC-MIT
Experimental Results of the Coaxial Multipactor Experiment T.P. Graves, B. LaBombard, S.J. Wukitch, I.H. Hutchinson PSFC-MIT Summary A multipactor discharge is a resonant condition for electrons in an
More informationMultipactor-induced induced neutral pressure limits on Alcator C-Mod ICRF Performance
Multipactor-induced induced neutral pressure limits on Alcator C-Mod ICRF Performance T. P. Graves, B. LaBombard, S. J. Wukitch, I. H. Hutchinson MIT Plasma Science and Fusion Center American Physical
More informationRF Power Generation II
RF Power Generation II Klystrons, Magnetrons and Gyrotrons Professor R.G. Carter Engineering Department, Lancaster University, U.K. and The Cockcroft Institute of Accelerator Science and Technology Scope
More informationDark current and multipacting trajectories simulations for the RF Photo Gun at PITZ
Dark current and multipacting trajectories simulations for the RF Photo Gun at PITZ Introduction The PITZ RF Photo Gun Field simulations Dark current simulations Multipacting simulations Summary Igor Isaev
More informationDetailed Design Report
Detailed Design Report Chapter 4 MAX IV Injector 4.6. Acceleration MAX IV Facility CHAPTER 4.6. ACCELERATION 1(10) 4.6. Acceleration 4.6. Acceleration...2 4.6.1. RF Units... 2 4.6.2. Accelerator Units...
More informationMultipaction Breakdown Prediction of Passive Microwave Devices with CST Particle-Studio
Multipaction Breakdown Prediction of Passive Microwave Devices with CST Particle-Studio José R. Montejo Garai (1), Carlos A. Leal (1), Jorge A. Ruiz Cruz (2) Jesús M. Rebollar Machaín (1) (1) Dpto. de
More informationLow-Noise, High-Efficiency and High-Quality Magnetron for Microwave Oven
Low-Noise, High-Efficiency and High-Quality Magnetron for Microwave Oven N. Kuwahara 1*, T. Ishii 1, K. Hirayama 2, T. Mitani 2, N. Shinohara 2 1 Panasonic corporation, 2-3-1-3 Noji-higashi, Kusatsu City,
More informationLimitations of a Load Pull System
Limitations of a Load Pull System General Rule: The Critical Sections in a Load Pull measurement setup are the sections between the RF Probe of the tuners and the DUT. The Reflection and Insertion Loss
More informationDESIGN AND PERFORMANCE OF L-BAND AND S-BAND MULTI BEAM KLYSTRONS
DESIGN AND PERFORMANCE OF L-BAND AND S-BAND MULTI BEAM KLYSTRONS Y. H. Chin, KEK, Tsukuba, Japan. Abstract Recently, there has been a rising international interest in multi-beam klystrons (MBK) in the
More informationA KIND OF COAXIAL RESONATOR STRUCTURE WITH LOW MULTIPACTOR RISK. Engineering, University of Electronic Science and Technology of China, Sichuan, China
Progress In Electromagnetics Research Letters, Vol. 39, 127 132, 2013 A KIND OF COAXIAL RESONATOR STRUCTURE WITH LOW MULTIPACTOR RISK Xumin Yu 1, 2, Xiaohong Tang 1, Juan Wang 2, Dan Tang 2, and Xinyang
More informationA HIGH POWER LONG PULSE HIGH EFFICIENCY MULTI BEAM KLYSTRON
A HIGH POWER LONG PULSE HIGH EFFICIENCY MULTI BEAM KLYSTRON A.Beunas and G. Faillon Thales Electron Devices, Vélizy, France S. Choroba DESY, Hamburg, Germany Abstract THALES ELECTRON DEVICES has developed
More informationSvetlana 3CX10,000A7/8160
Svetlana 3CX1,A7/816 High-Mu Power Triode T he Svetlana 3CX1,A7/816 is a high-performance ceramic/metal power triode designed for use in zero-bias, class B RF or audio amplifiers. A modern mesh filament
More informationPulsed Klystrons for Next Generation Neutron Sources Edward L. Eisen - CPI, Inc. Palo Alto, CA, USA
Pulsed Klystrons for Next Generation Neutron Sources Edward L. Eisen - CPI, Inc. Palo Alto, CA, USA Abstract The U.S. Department of Energy (DOE) Office of Science has funded the construction of a new accelerator-based
More information18 GHz, 2.2 kw KLYSTRON GENERATOR GKP 24KP 18GHz WR62 3x400V
18 GHz, 2.2 kw KLYSTRON GENERATOR GKP 24KP 18GHz WR62 3x400V With its characteristics of power stability whatever the load, very fast response time when pulsed (via external modulated signal), low ripple,
More informationDesign and Simulation of High Power RF Modulated Triode Electron Gun. A. Poursaleh
Design and Simulation of High Power RF Modulated Triode Electron Gun A. Poursaleh National Academy of Sciences of Armenia, Institute of Radio Physics & Electronics, Yerevan, Armenia poursaleh83@yahoo.com
More informationDesign, Fabrication and Testing of Gun-Collector Test Module for 6 MW Peak, 24 kw Average Power, S-Band Klystron
Available online www.ejaet.com European Journal of Advances in Engineering and Technology, 2014, 1(1): 11-15 Research Article ISSN: 2394-658X Design, Fabrication and Testing of Gun-Collector Test Module
More informationA New 4MW LHCD System for EAST
1 EXW/P7-29 A New 4MW LHCD System for EAST Jiafang SHAN 1), Yong YANG 1), Fukun LIU 1), Lianmin ZHAO 1) and LHCD Team 1) 1) Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China E-mail
More informationPseudospark-sourced Micro-sized Electron Beams for High Frequency klystron Applications
Pseudospark-sourced Micro-sized Electron Beams for High Frequency klystron Applications H. Yin 1*, D. Bowes 1, A.W. Cross 1, W. He 1, K. Ronald 1, A. D. R. Phelps 1, D. Li 2 and X. Chen 2 1 SUPA, Department
More informationHHH. report from MULCOPIM 08. Frank Zimmermann LCU Meeting, 1 October 2008
report from HHH MULCOPIM 08 Frank Zimmermann LCU Meeting, 1 October 2008 We acknowledge the support of the European Community-Research Infrastructure Activity under the FP6 "Structuring the European Research
More informationINTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATION ENGINEERING & TECHNOLOGY (IJECET)
INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATION ENGINEERING & TECHNOLOGY (IJECET) International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN 0976 6464(Print)
More informationPower Amplifier 0.5 W 2.4 GHz AM TR Features. Functional Schematic. Description. Pin Configuration 1. Ordering Information
Features Ideal for 802.11b ISM Applications Single Positive Supply Output Power 27.5 dbm 57% Typical Power Added Efficiency Downset MSOP-8 Package Description M/A-COM s is a 0.5 W, GaAs MMIC, power amplifier
More informationCathode Studies at FLASH: CW and Pulsed QE measurements
Cathode Studies at FLASH: CW and Pulsed QE measurements L. Monaco, D. Sertore, P. Michelato S. Lederer, S. Schreiber Work supported by the European Community (contract number RII3-CT-2004-506008) 1/27
More informationTOSHIBA Industrial Magnetron E3328
TOSHIBA E3328 is a fixed frequency continuous wave magnetron intended for use in the industrial microwave heating applications. The average output power is 3kW in the frequency range from 2450 to 2470
More informationRF POWER GENERATION FOR FUTURE LINEAR COLLIDERS* 1. Introduction
SLAC-PUB-5282 June 1990 (A) RF POWER GENERATION FOR FUTURE LINEAR COLLIDERS* W. R. Fowkes, M. A. Allen, R. S. Callin, G. Caryotakis, K. R. Eppley, K. S. Fant, Z. D. Farkas, J. Feinstein, K. Ko, R. F. Koontz,
More informationSummary of recent photocathode studies
Summary of recent photocathode studies S. Lederer, S. Schreiber DESY L. Monaco, D. Sertore INFN Milano LASA FLASH seminar November 17 th, 2009 Outlook Cs 2 Te photocathodes Pulsed QE measurements laser
More informationEtching Part 2. Saroj Kumar Patra. TFE4180 Semiconductor Manufacturing Technology. Norwegian University of Science and Technology ( NTNU )
1 Etching Part 2 Chapter : 16 Semiconductor Manufacturing Technology by M. Quirk & J. Serda Spring Semester 2014 Saroj Kumar Patra, Norwegian University of Science and Technology ( NTNU ) 2 Introduction
More information14 GHz, 2.2 kw KLYSTRON GENERATOR GKP 22KP 14GHz WR62 3x400V
14 GHz, 2.2 kw KLYSTRON GENERATOR GKP 22KP 14GHz WR62 3x400V With its characteristics of power stability independent of the load, very fast response time when pulsed (via external modulated signal), low
More informationTutorial: Trak design of an electron injector for a coupled-cavity linear accelerator
Tutorial: Trak design of an electron injector for a coupled-cavity linear accelerator Stanley Humphries, Copyright 2012 Field Precision PO Box 13595, Albuquerque, NM 87192 U.S.A. Telephone: +1-505-220-3975
More informationTECHNICAL SPECIFICATION Multi-beam S-band Klystron type BT267
TECHNICAL SPECIFICATION Multi-beam S-band Klystron type BT267 The company was created for the development and manufacture of precision microwave vacuum-electron-tube devices (VETD). The main product areas
More informationRF Solutions for Science.
RF Solutions for Science www.thalesgroup.com State-of-the-art RF sources for your scientific needs High-power klystrons HIGH KLYSTRONS WITH RF LONG PULSE above 50 μs Thales has been one of the leading
More informationEXPERIMENTAL STUDY OF MULTIPACTOR SUPPRESSION IN DIELECTRIC MATERIALS
EXPERIMENTAL STUDY OF MULTIPACTOR SUPPRESSION IN DIELECTRIC MATERIALS Mohamed El Khaldi, Walid Kaabi To cite this version: Mohamed El Khaldi, Walid Kaabi. EXPERIMENTAL STUDY OF MULTIPACTOR SUP- PRESSION
More informationDevelopment of high power gyrotron and EC technologies for ITER
1 Development of high power gyrotron and EC technologies for ITER K. Sakamoto 1), K.Kajiwara 1), K. Takahashi 1), Y.Oda 1), A. Kasugai 1), N. Kobayashi 1), M.Henderson 2), C.Darbos 2) 1) Japan Atomic Energy
More informationOperating Experience and Reliability Improvements on the 5 kw CW Klystron at Jefferson Lab
Operating Experience and Reliability Improvements on the 5 kw CW Klystron at Jefferson Lab Richard Walker & Richard Nelson Jefferson Lab, Newport News VA Jefferson Lab is a $600M Department of Energy facility
More informationReview of Diamond SR RF Operation and Upgrades
Review of Diamond SR RF Operation and Upgrades Morten Jensen on behalf of Diamond Storage Ring RF Group Agenda Stats X-ray and LN2 pressure results Cavity Failure Conditioning in the RFTF Cavity Simulations
More informationLecture 17 Microwave Tubes: Part I
Basic Building Blocks of Microwave Engineering Prof. Amitabha Bhattacharya Department of Electronics and Communication Engineering Indian Institute of Technology, Kharagpur Lecture 17 Microwave Tubes:
More informationOF THIS DOCUMENT IS W8.MTO ^ SF6
fflgh PEAK POWER TEST OF S-BAND WAVEGUIDE SWITCHES A. Nassiri, A. Grelick, R. L. Kustom, and M. White CO/0 ^"^J} 5, t * y ^ * Advanced Photon Source, Argonne National Laboratory» \^SJ ^ ^ * **" 9700 South
More informationDESIGN AND TECHNOLOGICAL ASPECTS OF KLYSTRON DEVELOPMENT
DESIGN AND TECHNOLOGICAL ASPECTS OF KLYSTRON DEVELOPMENT Dr. L M Joshi Emeritus Scientist CSIR-CEERI, PILANI lmj1953@gmail.com 22 February 2017 IPR 1 Schemetic Diagram 22 February 2017 IPR 2 Basic Principle
More informationStatus of SOLARIS. Paweł Borowiec On behalf of Solaris Team
Status of SOLARIS Paweł Borowiec On behalf of Solaris Team e-mail: pawel.borowiec@uj.edu.pl XX ESLS-RF Meeting, Villingen 16-17.11.2016 Outline 1. Timeline 2. Injector 3. Storage ring 16-17.11.2016 XX
More informationEvaluation of Performance, Reliability, and Risk for High Peak Power RF Sources from S-band through X-band for Advanced Accelerator Applications
Evaluation of Performance, Reliability, and Risk for High Peak Power RF Sources from S-band through X-band for Advanced Accelerator Applications Michael V. Fazio C. Adolphsen, A. Jensen, C. Pearson, D.
More informationMPI Cable Selection Guide
MPI Cable Selection Guide MPI engineers focus to provide on optimal cable solutions taking into account a number of requirements specific for wafer-level measurement systems: optimal cable length, cable
More informationCS Series Motorized Coaxial Transfer Switches
CS Series Motorized Coaxial Transfer Switches Features 3 or 4 port configurations Three port application require only the addition of a shorting cap Non-volatile position memory VSWR
More informationANKA RF System - Upgrade Strategies
ANKA RF System - Upgrade Strategies Vitali Judin ANKA Synchrotron Radiation Facility 2014-09 - 17 KIT University of the State Baden-Wuerttemberg and National Laboratory of the Helmholtz Association www.kit.edu
More informationEMC at ITER. D. Beltran Electrical Engineering Division ITER Organization. RF & Hyper Conference Paris, 24 th May 2011
RF & Hyper Conference Paris, 24 th May 2011 EMC at ITER D. Beltran Electrical Engineering Division ITER Organization RF & Hyper Conference, 24 th May 2011, ITER_D_ Page 1 Outline 1. ITER introduction 2.
More informationOPERATIONAL EXPERIENCE AT J-PARC
OPERATIONAL EXPERIENCE AT J-PARC Hideaki Hotchi, ) for J-PARC commissioning team ), 2), ) Japan Atomic Energy Agency (JAEA), Tokai, Naka, Ibaraki, 39-95 Japan, 2) High Energy Accelerator Research Organization
More informationKLYSTRON GUN ARCING AND MODULATOR PROTECTION
SLAC-PUB-10435 KLYSTRON GUN ARCING AND MODULATOR PROTECTION S.L. Gold Stanford Linear Accelerator Center (SLAC), Menlo Park, CA USA Abstract The demand for 500 kv and 265 amperes peak to power an X-Band
More informationWire Survival Test of Crowbar Less, High Voltage DC, Klystron Bias Power Supply
Open Science Journal of Electrical and Electronic Engineering 2017; 4(1): 1-9 http://www.openscienceonline.com/journal/j3e Wire Survival Test of Crowbar Less, High Voltage DC, Klystron Bias Power Supply
More informationPrinciples of Electrostatic Chucks 6 Rf Chuck Edge Design
Principles of Electrostatic Chucks 6 Rf Chuck Edge Design Overview This document addresses the following chuck edge design issues: Device yield through system uniformity and particle reduction; System
More informationPerformance Characteristics of Steady-State MPD Thrusters with Permanent Magnets and Multi Hollow Cathodes for Manned Mars Exploration
Performance Characteristics of Steady-State MPD Thrusters with Permanent Magnets and Multi Hollow Cathodes for Manned Mars Exploration IEPC-2015-197 /ISTS-2015-b-197 Presented at Joint Conference of 30th
More informationXFEL High Power RF System Recent Developments
XFEL High Power RF System Recent Developments for the XFEL RF Group Outline XFEL RF System Requirements Overview Basic Layout RF System Main Components Multibeam Klystrons Modulator RF Waveguide Distribution
More informationFeatures. PFD Output Voltage 2000 mv, Pk - Pk. PFD Gain Gain = Vpp / 2π Rad khz 100 MHz Square Wave Ref.
HMC98LP5 / 98LP5E Typical Applications The HMC98LP5(E) is ideal for: Satellite Communication Systems Point-to-Point Radios Military Applications Sonet Clock Generation Functional Diagram Features Ultra
More informationRecent ITER-Relevant Gyrotron Tests
Journal of Physics: Conference Series Recent ITER-Relevant Gyrotron Tests To cite this article: K Felch et al 2005 J. Phys.: Conf. Ser. 25 13 View the article online for updates and enhancements. Related
More informationUNIT-3 Part A. 2. What is radio sonde? [ N/D-16]
UNIT-3 Part A 1. What is CFAR loss? [ N/D-16] Constant false alarm rate (CFAR) is a property of threshold or gain control devices that maintain an approximately constant rate of false target detections
More informationStandard/Handbook for Radio Frequency (RF) Breakdown Prevention in Spacecraft Components
AEROSPACE REPORT NO. TOR-2014-02198 Standard/Handbook for Radio Frequency (RF) Breakdown Prevention in Spacecraft Components May 28, 2014 Timothy P. Graves Engineering and Integration Space Based Surveillance
More informationTEST RESULTS OF THE 84 GHZ / 200 KW / CW GYROTRON
TEST RESULTS OF THE 84 GHZ / 200 KW / CW GYROTRON V.I. Belousov, A.A.Bogdashov, G.G.Denisov, V.I.Kurbatov, V.I.Malygin, S.A.Malygin, V.B.Orlov, L.G.Popov, E.A.Solujanova, E.M.Tai, S.V.Usachov Gycom Ltd,
More informationDEVELOPMENT OF X-BAND KLYSTRON TECHNOLOGY AT SLAC
DEVELOPMENT OF X-BAND KLYSTRON TECHNOLOGY AT SLAC George Caryotakis, Stanford Linear Accelerator Center P.O. Box 4349 Stanford, CA 94309 Abstract * The SLAC design for a 1-TeV collider (NLC) requires klystrons
More informationCathode Spot Movement in Vacuum Arc Using Silicon Cathode
Cathode Spot Movement in Vacuum Arc Using Silicon Cathode IEPC-2013-422 Presented at the 33rd International Electric Propulsion Conference, The George Washington University Washington, D.C. USA Joel D.
More informationDevelopment of Multiple Beam Guns for High Power RF Sources for Accelerators and Colliders
SLAC-PUB-10704 Development of Multiple Beam Guns for High Power RF Sources for Accelerators and Colliders R. Lawrence Ives*, George Miram*, Anatoly Krasnykh @, Valentin Ivanov @, David Marsden*, Max Mizuhara*,
More informationAdvanced Test Equipment Rentals ATEC (2832)
E stablished 1981 Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832) Technical Datasheet Scalar Network Analyzer Model 8003-10 MHz to 40 GHz The Giga-tronics Model 8003 Precision Scalar
More informationResults of recent photocathode studies at FLASH. S. Lederer, S. Schreiber DESY. L. Monaco, D. Sertore, P. Michelato INFN Milano LASA
Results of recent photocathode studies at FLASH S. Lederer, S. Schreiber DESY L. Monaco, D. Sertore, P. Michelato INFN Milano LASA FLASH seminar October 21 st, 2008 Outlook Cs 2 Te photocathodes cw QE
More informationThe Use of an Electron Microchannel as a Self-Extracting and Focusing Plasma Cathode Electron Gun
The Use of an Electron Microchannel as a Self-Extracting and Focusing Plasma Cathode Electron Gun S. CORNISH, J. KHACHAN School of Physics, The University of Sydney, Sydney, NSW 6, Australia Abstract A
More informationThe LEP Superconducting RF System
The LEP Superconducting RF System K. Hübner* for the LEP RF Group CERN The basic components and the layout of the LEP rf system for the year 2000 are presented. The superconducting system consisted of
More informationDEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK
DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK SUBJECT NAME : MICROWAVE ENGINEERING UNIT I BASIC MICROWAVE COMPONENTS 1. State Faraday s rotation law. 2. State the properties of
More informationHigh Brightness Injector Development and ERL Planning at Cornell. Charlie Sinclair Cornell University Laboratory for Elementary-Particle Physics
High Brightness Injector Development and ERL Planning at Cornell Charlie Sinclair Cornell University Laboratory for Elementary-Particle Physics June 22, 2006 JLab CASA Seminar 2 Background During 2000-2001,
More informationFeatures. = +25 C, IF = 1 GHz, LO = +13 dbm*
v.5 HMC56LM3 SMT MIXER, 24-4 GHz Typical Applications Features The HMC56LM3 is ideal for: Test Equipment & Sensors Point-to-Point Radios Point-to-Multi-Point Radios Military & Space Functional Diagram
More information4.4 Injector Linear Accelerator
4.4 Injector Linear Accelerator 100 MeV S-band linear accelerator based on the components already built for the S-Band Linear Collider Test Facility at DESY [1, 2] will be used as an injector for the CANDLE
More informationNew Results on the Electron Cloud at the Los Alamos PSR
New Results on the Electron Cloud at the Los Alamos PSR Robert Macek, LANL, 4/15/02 Co-authors: A. Browman, D. Fitzgerald, R. McCrady, T. Spickermann, & T. S. Wang - LANL For more information see the website
More informationKlystron Tubes. Two forms of such a device, also called linear beam klystron, are given in the following figure.
Klystron Tubes Go to the klystron index The principle of velocity-variation, first used in Heil oscillators, was also used in other microwave amplifying and oscillating tubes. The application for klystron
More informationEMI/EMC diagnostic and debugging
EMI/EMC diagnostic and debugging 1 Introduction to EMI The impact of Electromagnetism Even on a simple PCB circuit, Magnetic & Electric Field are generated as long as current passes through the conducting
More informationSRS and ERLP developments. Andrew moss
SRS and ERLP developments Andrew moss Contents SRS Status Latest news Major faults Status Energy Recovery Linac Prototype Latest news Status of the RF system Status of the cryogenic system SRS Status Machine
More information4617 Super Power Triode
4617 Super Power Triode Matrix-Oxide-Type Cathode DoubIe-Ended Terminal Configuration for Symmetrical Circuity Liquid Cooled Peak Power Output - 8 MW The BURLE-4617 is a water-cooled super-power triode
More informationFeatures. = +25 C, 50 Ohm System
v1.111 47 Analog Phase Shifter, Typical Applications The is ideal for: EW Receivers Military Radar Test Equipment Satellite Communications Beam Forming Modules Features Wide Bandwidth: 47 Phase Shift Low
More informationNEW METHOD FOR KLYSTRON MODELING
NEW METHOD FOR KLYSTRON MODELING Y. H. Chin, KEK, 1-1 Oho, Tsukuba-shi, Ibaraki-ken, 35, Japan Abstract We have developed a new method for a realistic and more accurate simulation of klystron using the
More informationTEST WIRE FOR HIGH VOLTAGE POWER SUPPLY CROWBAR SYSTEM
TEST WIRE FOR HIGH VOLTAGE POWER SUPPLY CROWBAR SYSTEM Joseph T. Bradley III and Michael Collins Los Alamos National Laboratory, LANSCE-5, M.S. H827, P.O. Box 1663 Los Alamos, NM 87545 John M. Gahl, University
More informationSLAC-PUB-2380 August 1979 (A)
1979 LINEAR ACCELERATOR CONFERENCE RF SOURCES DEVELOPMENTS* Jean V. Lebacqz Stanford Linear Accelerator Center Stanford University, Stanford, California 94305 SLAC-PUB-2380 August 1979 (A) Abstract The
More information45 MW, 22.8 GHz Second-Harmonic Multiplier for High-Gradient Tests*
US High Gradient Research Collaboration Workshop. SLAC, May 23-25, 2007 45 MW, 22.8 GHz Second-Harmonic Multiplier for High-Gradient Tests* V.P. Yakovlev 1, S.Yu. Kazakov 1,2, and J.L. Hirshfield 1,3 1
More informationDevelopment of High Power Vacuum Tubes for Accelerators and Plasma Heating
Development of High Power Vacuum Tubes for Accelerators and Plasma Heating Vishnu Srivastava Microwave Tubes Division, CSIR-Central Electronics Engineering Research Institute, Pilani-333031, Rajasthan,
More informationINFN School on Electron Accelerators. RF Power Sources and Distribution
INFN School on Electron Accelerators 12-14 September 2007, INFN Sezione di Pisa Lecture 7b RF Power Sources and Distribution Carlo Pagani University of Milano INFN Milano-LASA & GDE The ILC Double Tunnel
More informationCCD220 Back Illuminated L3Vision Sensor Electron Multiplying Adaptive Optics CCD
CCD220 Back Illuminated L3Vision Sensor Electron Multiplying Adaptive Optics CCD FEATURES 240 x 240 pixel image area 24 µm square pixels Split frame transfer 100% fill factor Back-illuminated for high
More information9th ESLS RF Meeting September ALBA RF System. F. Perez. RF System 1/20
ALBA RF System F. Perez RF System 1/20 ALBA Synchrotron Light Source in Barcelona (Spain) 3 GeV accelerator 30 beamlines (7 on day one) 50-50 Spanish Government Catalan Government First beam for users
More information!! 1.0 Technology Brief
1.0 Technology Brief Table of Contents Contents Scope... 3 Some Satellite Television Principles... 3 Compression... 3... 3 91 Degrees West Longitude... 4 82 Degrees West Longitude... 5 Distribution Technology...
More informationSURFACE MOUNT HIGH REPEATABILITY, BROADBAND TO-5 RELAYS DPDT
SURFACE MOUNT HIGH REPEATABILITY, BROADBAND TO-5 RELAYS DPDT SERIES SGRF300 SGRF300D SGRF300DD SGRF303 SGRF303D SGRF303DD RELAY TYPE Repeatable, RF relay Repeatable, RF relay with internal diode for coil
More informationAnalog Devices Welcomes Hittite Microwave Corporation NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED
Analog Devices Welcomes Hittite Microwave Corporation NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED www.analog.com www.hittite.com THIS PAGE INTENTIONALLY LEFT BLANK v1.55 Typical Applications The is
More informationNon Magnetic Connectors
Non Magnetic Connectors Johnson Components builds coaxial connectors using innovative materials and design to provide Mil Spec Performance at a commercial price. Now we offer our Non Magnetic Connectors
More informationCEBAF 8 kw CW KLYSTRON SPECIFICATION EE0043, Rev. H January 15, 1998
Thomas Jefferson National Laboratory Specification CEBAF 8 kw CW KLYSTRON SPECIFICATION EE0043, Rev. H January 15, 1998 Approved by: Richard Nelson Date William Merz Date Claus Rode Date EE0044, Rev. H
More informationClosed Cycle Cryogenic Probe Station
The ARS PS-CC Probe Station is designed for the ultimate in flexibility for non-destructive device testing. The ability to upgrade and modify this system for further device testing has been in the forefront
More informationType "N" Connectors. Type "N" Interface Dimensions
Type "N" Connectors The type N series coaxial connectors were originally designed as medium-size low voltage constant impedance 50 OHM connectors. Type N connectors found immediate popularity for microwave
More informationIOT OPERATIONAL EXPERIENCE ON ALICE AND EMMA AT DARESBURY LABORATORY
IOT OPERATIONAL EXPERIENCE ON ALICE AND EMMA AT DARESBURY LABORATORY A. Wheelhouse ASTeC, STFC Daresbury Laboratory ESLS XVIII Workshop, ELLETRA 25 th 26 th November 2010 Contents Brief Description ALICE
More informationThyratrons. High Energy Switches. Features. Description
Thyratrons Lighting Imaging Telecom High Energy Switches D A T A S H E E T Description Thyratrons are fast acting high voltage switches suitable for a variety of applications including radar, laser and
More information75 Ohm N Male Connector Crimp/Solder Attachment for RG6
75 Ohm N Male Connector Crimp/Solder Attachment for RG6 RF Connectors Technical Data Sheet PE4508 Configuration N Male Connector 75 Ohms Straight Body Geometry Features Max Operating Frequency 15 GHz Good
More informationChris Gilmour Studies into the Design of a Higher Efficiency Ku Band ring-loop Travelling Wave Tube SWS using the CST PIC Software.
Chris Gilmour Studies into the Design of a Higher Efficiency Ku Band ring-loop Travelling Wave Tube SWS using the CST PIC Software.... the power in microwaves! History TMD have been making ring-loop TWTs
More informationK800 RF AMPLIFIER TUBE UPGRADE
R. F. Note 107 John Vincent August 5, 1988 K800 RF AMPLIFIER TUBE UPGRADE Contents: 1. Introduction 2. RCA 4648 Operating Experience and Evaluation. 3. Tube Selection Criteria 4. Cost and Availability
More informationIOT RF Power Sources for Pulsed and CW Linacs
LINAC 2004 Lübeck, August 16 20, 2004 IOT RF Power Sources H. Bohlen, Y. Li, Bob Tornoe Communications & Power Industries Eimac Division, San Carlos, CA, USA Linac RF source property requirements (not
More informationStatus of BESSY II and berlinpro. Wolfgang Anders. Helmholtz-Zentrum Berlin for Materials and Energy (HZB) 20th ESLS-RF Meeting
Status of BESSY II and berlinpro Wolfgang Anders Helmholtz-Zentrum Berlin for Materials and Energy (HZB) 20th ESLS-RF Meeting 16.-17.11.2016 at PSI Outline BESSY II Problems with circulators Landau cavity
More informationCommissioning the TAMUTRAP RFQ cooler/buncher. E. Bennett, R. Burch, B. Fenker, M. Mehlman, D. Melconian, and P.D. Shidling
Commissioning the TAMUTRAP RFQ cooler/buncher E. Bennett, R. Burch, B. Fenker, M. Mehlman, D. Melconian, and P.D. Shidling In order to efficiently load ions into a Penning trap, the ion beam should be
More informationEPJ Web of Conferences 95,
EPJ Web of Conferences 95, 04012 (2015) DOI: 10.1051/ epjconf/ 20159504012 C Owned by the authors, published by EDP Sciences, 2015 The ELENA (Extra Low Energy Antiproton) project is a small size (30.4
More informationSpear3 RF System Sam Park 11/06/2003. Spear3 RF System. High Power Components Operation and Control. RF Requirement.
Spear3 RF System RF Requirement Overall System High Power Components Operation and Control SPEAR 3 History 1996 Low emittance lattices explored 1996 SPEAR 3 proposed 11/97 SPEAR 3 design study team formed
More informationGaAs DOUBLE-BALANCED MIXER
MM1-124S The MM1-124S is a passive double balanced MMIC mixer. It features excellent conversion loss, superior isolations and spurious performance across a broad bandwidth, in a highly miniaturized form
More informationX-Band Klystron Development at
X-Band Klystron Development at SLAC Slide 1 The Beginning X-band klystron work began at SLAC in the mid to late 80 s to develop high frequency (4x SLAC s-band), high power RF sources for the linear collider
More informationCPI Gyrotrons For Fusion EC Heating
CPI Gyrotrons For Fusion EC Heating H. Jory, M. Blank, P. Borchard, P. Cahalan, S. Cauffman, T. S. Chu, and K. Felch CPI, Microwave Power Products Division 811 Hansen Way, Palo Alto, CA 94303, USA e-mail:
More informationPerformance of a DC GaAs photocathode gun for the Jefferson lab FEL
Nuclear Instruments and Methods in Physics Research A 475 (2001) 549 553 Performance of a DC GaAs photocathode gun for the Jefferson lab FEL T. Siggins a, *, C. Sinclair a, C. Bohn b, D. Bullard a, D.
More information