Silicon PhotoMultiplier Kits

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1 Silicon PhotoMultiplier Kits Silicon PhotoMultipliers (SiPM) consist of a high density (up to ~ 10 3 /mm 2 ) matrix of photodiodes with a common output. Each diode is operated in a limited Geiger- Müller regime, in order to achieve gain at the level of SiPM are sensitive to single photons and feature a genuine photon number resolving capability (even at room temperature), with a dynamic range at the level of a few hundreds photons/burst and with reasonable photon detection efficiency (PDE). Compactness, robustness, low cost, low operating voltage and power consumption represent the advantages over traditional photodetectors. CAEN offers two modular kits dedicated to these devices, targeted to education at undergraduate level and to resarchers new in the field or requiring an easy-to-use tool for comparing SiPM from different vendors. Evaluation Kit Educational Kit CAEN offers a modular development kit dedicated to Silicon Photomultipliers, representing the state-of-the-art in low light detection with photon number resolving capabilities. Evaluation Kit Both kits are shipped in a robust case ideal for a safe and easy transportation Educational Kit 79

2 SIPM Applications Sensor testing & characterization Using both the Evaluation and the Educational Kits it is possible to measure most of the basic detector figures (e.g. gain, photon number resolving power and dark count rate) with a set-up including the Ultrafast LED driver SP5601, the General Purpose Amplifier and Power Supply Unit (SP5600) and the Desktop Digitizer DT5720A running a dedicated Digital Pulse Processing firmware for Charge Integration (DPP CI). Set-up for SiPM testing & characterization Spectrum of the photons emitted by the LED Driver and detected by a SiPM at room temperature. Detecting Gamma Rays The Educational Kit includes a mini-spectrometer, ideal for gamma ray detection. The spectrometer s design allows an easy connection to the General Purpose Amplifier and Power Supply Unit (SP5600). The signal produced by a crystal coupled with a 3x3 mm 2 SiPM is amplified by the SP5600 and then digitized by the Desktop Digitizer. Different crystals can be mounted in the spectrometer. Set-up for detecting gamma rays Three different crystals are included in the kit (LYSO, BGO, CsI) to show how the different properties of these inorganic scintillators (Light Yield, Decay Time, Efficiency) affect the spectral response. 137 Cs spectrum obtained with a CsI crystal. The resolution on the 662 kev peak corresponds to a FWHM ~10% of the peak. 80 More Technical Specifications available on

3 Detecting Cosmic Rays and β particles SIPM The Educational Kit includes a polystirene plastic scintillating tile with a sensitive volume of 150 x 150 x 10 mm 3, with light collected by a WLS fiber and conveyed to two SiPMs mounted on the SP5600. The signals from the first amplification stage of the SP5600 are routed to the discrimination stage, providing through a coincidence logic the trigger and the gate for digitizing the SiPM output. The discrimination and the coincidence can be also performed inside the FPGA of the Digitizer. Set-up for detecting cosmic rays and β particles The coincidence scheme naturally enhance the discrimination power against the background rate, as illustrated in the figure, where the counting frequency vs. the discrimination value in the SP5600 is shown. In the reported measurements, the sensors were equalized in gain and the coincidence window for the reported measurements was 50 ns. Two channel coincidence rate versus discrimination threshold. The black data correspond to the random coincidence rate of the two sensors. Products SP5600A KIT Silicon PhotoMultiplier Educational Kit A two channel USB 2.0 Desktop Digitizer with Charge Integration firmware DT5720A A USB 2.0 General Purpose Amplifier and Power Supply Unit (SP5600) Two hardware SiPM adapters (SiPM holder) with embedded two 1 x 1 mm 2 Hamamatsu Model MPPC S C An ultra fast LED Driver includes a violet LED source close to the maximum peak efficiency of the sensors One Scintillating Tile w/wls Fiber embedded One Mini-Spectrometer mounting an 3 x 3 mm 2 Hamamatsu S C sensor. Three Inorganic Scintillator Crystals (3 x 3 x 15 mm 3 ): - LYSO (Cerium-doped Lutetium Yttrium Orthosilicate) - BGO (Bismuth Germanate Oxide) - CsI (Cesium Iodide) All necessary cables, connectors and optical grease are included. LabView based control software (Windows only) The Educational Kit is intended for educational purposes. It allows students to perform several laboratory development tests (like gamma and beta spectroscopy) as a tool for SiPM detector development and education. In this kit you may find, in addition to the power supply and amplification unit, the digitizer and the LED driver, a minispectrometer with 3 different inorganic scintillators easily exchangeable for gamma spectrometry and a scintillating tile for beta spectroscopy and cosmic rays detection using the two channel coincidence capability of the provided electronics. WK5600XAAAAA SP5600AKit SiPM Educational Kit 81

4 SIPM SP5600B Kit Silicon PhotoMultiplier Evaluation Kit A two channel USB 2.0 Desktop Digitizer with Charge Integration firmware DT5720A A USB 2.0 General Purpose Amplifier and Power Supply Unit (SP5600) Two hardware SiPM adapters (SiPM holder) with embedded one 1 x 1 mm 2 Hamamatsu Model MPPC S C, one 1 x 1 mm 2 Hamamatsu Model MPPC S C and one more empty holder for user s custom sensor. An ultra fast LED Driver includes a violet LED source close to the maximum peak efficiency of the sensors. All necessary cables and connectors are included. LabView based control software (Windows only) The Evaluation Kit is intended for users who want to test sensors and characterize them in preparation of their final detector configuration. In this kit you may find a programmable power supply and amplification unit for the detector biasing and readout providing also gain stabilization to compensate temperature variations, a two channel digitizer for a fast data acquisition and a LED driver as a reference light source to pulse the SiPMs for a reliable and controlled test condition. WK5600XBAAAA SP5600BKit SiPM Evaluation Kit DT5720A 2 Channel 12 bit 250 MS/s Digitizer The DT5720A is a CAEN Desktop Waveform digitizer housing 2 channels 12 bit 250 MS/s ADC with a dedicated charge integrating firmware (DPP-CI) for real time pulse processing. This feature allows to perform on-line processing on detector signal directly digitized. 2 Channel 12 bit 250 MS/s Digitizer Digital Pulse Processing for Charge Integration DPP-CI Best suited for PMT and SiPM/MPPC readout at low and high rates Mid-High speed signals (Typ: output of PMT/SiPM) Good timing resolution with fast signals (rise time < 100 ns) Optical Link and USB 2.0 interfaces Dimension: 154 x 50 x 164 mm 3 (WxHxD) WDT5720AXAAA DT5720A - 2 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C4, SE SP Channels General Purpose Amplifier and Power Supply Unit The SP5600 is a General purpose Power Supply and Amplification Unit, integrating up to two SiPMs in a mother & daughter architecture allowing easy mounting and replacement of the sensors. The basic configuration features two channels with indipendent gain control up to 50 db and provides the bias voltage (up to 120 V) to the sensors with gain stabilization. Each channel can provide a digital output generated by the fast leading edge discriminators. A timing coincidence of the two channels is also available. Variable amplification gain (up to 50 db) Low noise, not to spoil the sensor performances for small signals Wideband, to comply with the fast sensor response Fast leading edge discriminator and time coincidence Provides the bias for the sensors with gain stabilization USB 2.0 interface Mechanical structure with an embedded SiPM 1 x 1 mm 2 Dimension: 150 x 50 x 70 mm 3 (WxHxD) WSP5600XAAAA SP Channels General Purpose Amplifier SP5601 LED Driver The SP5601 is an ultra-fast LED Driver with pulse width at ns level, tunable intensity and frequency, that provides a low-cost tool for the detector characterization. The LED pulse generation can be triggered by an internal oscillator or by an external pulser. Width of pulse ns LED color: violet (400nm) 1500 mcd Pulse generator: internal/external Optical output connectors: FC Optical fiber included Dimension: 79 x 42 x 102 mm 3 (WxHxD) WSP5601XAAAA SP LED Driver for SiPM development kit 82 More Technical Specifications available on

5 SP5602 Scintillating Tile The SP5602 is a plastic scintillating tile, with a WLS fiber embedded to collect the scintillator light, FC terminated. The tile, with a sensitive volume of 150 x 150 x 10 mm3, is the ideal tool for tests with beta emitting isotopes and cosmic rays. Sensitive volume: 150 x 150 x 10 mm 3 Scintillator: polystyrene Light guide: embedded WLS fiber Output connectors: FC Dimension: 200 x 150 x 10 mm 3 (WxHxD) SIPM WSP5602XAAAA SP Scintillating Tile SP5603 Mini Spectrometer The SP5603 is a mini-spectrometer for gamma ray detection. The spectrometer is composed by a mechanical structure that houses a scintillating crystal, coupled to a dedicated 3 x 3 mm 2 SiPM. Three crystals (LYSO, BGO, CsI) are also provided. The spectrometer s design allows an easy connection to the SP5600. Mechanical structure for optimal SiPM to crystal coupling Crystal dimensions: 3 x 3 x 15 mm 3 Included crystals: LYSO, BGO, Csl One SiPM 3 x 3 mm 2 embedded Dimension: 40 mm (D), 35 mm (L) WSP5603XAAAA SP Mini Spectrometer with 3x3 sensor Silicon Photomultiplier Kit Control Software CAEN developed a dedicated control software for the control of the Silicon Photomultiplier Kit. Through a simple graphical interface the user can manage all the parameters of both the Power Supply, the Amplification Unit and the Digitizer in a single window. With few easy steps the user can control the Bias and the Gain of the SiPM. The user can also easily modify the thresholds and the digital outputs. In the same window the digitized signals can be monitored, for a real time fine tuning of the set-up. Energy spectra, Charge Vs. Time and Staircase plots are also displayed in the plot tab. The possibility to save the data to file has been implemented for further data analysis. No programming required Simultaneous control of the digitizer and of the SP5600 Unit User friendly all-in-a window graphical interface Data saving in two formats: ASCII, Binary 5 plots available: Wave, Histogram, Charge Vs. Time, Staircase, Counting Kit Type Item Description Educational Kit Evaluation Kit Rugged Case nr. 1 nr. 1 DT5720A 250 MS/s, 12 Bit Desktop Digitizer with DPP-CI nr. 1 nr. 1 SP5600 General Purpose Power Supply and Amplification Unit nr. 1 nr. 1 SP5601 LED Driver nr. 1 nr. 1 SP5650A Sensor Holders with Hamamatsu MPPC S C 1x1 mm 2 embedded nr. 2 nr. 1 SP5650B Sensor Holder with Hamamatsu MPPC S C 1x1 mm 2 embedded - nr. 1 SP5650Z Sensor Holder with no SiPM embedded - nr. 1 SP5603 Mini Spectrometer with Hamamatsu MPPC S C 3x3 mm 2 embedded nr. 1 - Scintillating crystals 3x3x15 mm 3 : CsI, BGO and LYSO nr. 3 - SP5602 Scintillating Tile nr. 1 - LEMO-LEMO cable nr. 1 nr. 1 MCX-LEMO cables nr. 2 nr. 2 MCX-MCX cables nr. 2 nr. 2 Optical Fiber FC terminated nr. 1 nr. 1 Optical grease nr. 1 - USB cables nr. 2 nr. 2 AC/DC adapter (+12 V out) with a 3-cord adapter nr. 1 nr. 1 Quick Start Guide and Documentation nr. 1 nr. 1 83