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cremat inc electronics for pulse detection skip to content cremat inc electronics for pulse detection charge sensitive preamplifiers and shaping amplifiers for radiation detectors and photodiodes products how to order how to use documents about us cr 11x csp modules our principal line of products are our charge sensitive preamplifier csp modules which are small 8 pin single in line package sip epoxy coated single channel circuits less than 1 square inch in size csp evaluation board the cr 150 r6 evaluation board makes it easier for you to evaluate cremat s line of charge sensitive preamplifiers the cr 150 r6 has an 8 pin socket to accept a preamplifier module as well as bnc connectors for the preamplifier output test input and detector bias input there is a jack for a 24v wall mounted power supply available separately csp housing because cremat s charge sensitive preamplifiers are relatively sensitive care must be taken to shield the active electronics from the usual ambient rf interference the cr 150 box r6 and cr 150 box r6 hv are designed to accept and fully shield the cr 150 r6 evaluation board we also now offer the cr 150 box nobias to house the cr 150 r6 board when detector biasing through the preamplifier is not used cr 200 x shaper modules shaping amplifiers are used to transform the shape of the pulses produced by charge sensitive preamplifiers to make the pulses gaussian shaped bell shaped improve signal to noise and provide gain for the signals similar to cremat s line of charge sensitive preamplifiers the cr 200 series are 8 pin single in line package sip epoxy coated single channel circuits less than 1 square inch in size they come in eight different shaping times from 50ns to 8μs shaper module eval board the cr 160 r9 1 evaluation board is intended for the evaluation of the cr 200 series of shaping amplifiers when used with a cr 200 shaping amplifier and the optional cr 210 baseline restoration module the cr 160 r9 1 creates a low noise gaussian shaping amplifier having input and output bnc connectors adjustable gain reversible polarity output offset adjustment and pole zero compensation housing for shaper eval board the cr 160 box r9 is a die cast aluminum housing intended for use with the cr 160 r9 evaluation test board holes have been positioned on the cr 160 box r9 in locations associated with bnc connector positions input and output power connector position 24v wall mount power adapter and dc power on the cr 160 r9 board there is also a rectangular hole to gain access to the fine gain adjustment potentiometer the piano style gain and polarity switches on the cr 160 r9 board cr 210 baseline restorer the cr 210 is a baseline restorer blr circuit developed to correct for the natural baseline depression at the shaping amplifier output occurring at medium to high count rates the cr 210 blr circuit will set the baseline at ground and result in higher resolution spectroscopic measurements in conditions of varying count rate cr 24v wall mount power supply the cr 24v wall mounted power supply provides power to either the cr 150 r6 evaluation board or the cr 160 r9 evaluation board the power supply can be used internationally because an assortment of connector blades are provided which can adapt to many different outlet styles instruments featuring cremat modules a number of other companies have developed detection instruments based on cremat modules these instruments are commercially available and are sold and supported by these other companies these instruments are certainly useful for radiation detection applications but they are also useful for evaluating cremat modules if you wish further information on these instruments or to have a discussion with a sales engineer you should contact these organizations directly charge sensitive preamplifiers explained use a charge sensitive preamplifier csp design to detect pulses with high precision and low noise learn more here what to buy to read out your detector want to know exactly which parts you need to buy for your type of detector find detailed descriptions for these types of detectors pin photodiodes avalanche photodiodes sipm photodiodes gas based detectors surface barrier pips detectors pmts faraday cups channel electron multipliers which csp module should i use here is a selection guide of our four csp modules detect femtojoule optical pulses with a common pin photodiode a low noise charge sensitive preamplifier and shaping amplifier you can detect femtojoule optical pulses here is a demonstration input protection notes extremely large input pulses caused by sparking detectors can destroy csps read here on methods to protect the input if necessary how to couple your detector you can use different methods to couple your detector to the preamplifier learn more here testing a csp need to verify that everything is working as intended inject pulses from a wave generator to the test input details here what polarity is the output here is an explanation of the preamplifier output polarity in various situations applying power to cremat s evaluation boards to power cremat eval boards you can apply both and dc power or you can use a wall mounted power supply such as the cr 24v here is what you need to know tips for getting good results here is advice to help you design and develop your own detection instrumentation using cremat csp modules won t the long decay tail cause problems with pulse pile up the output pulse of a csp takes the form of a short rise time 1μs followed by a long exponential decay lasting well in excess of 100μs won t this be a problem when detecting pulses at a high rate as the pulses will pile up on each other see an explanation here modular approach use a modular approach in developing radiation detection instrumentation changes or repairs may be simply effected by changing modules contact us email info cremat com phone 1 617 527 6590 address cremat inc 950 watertown st suite 3 west newton ma 02465 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