Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Variable-frequency drive wikipedia , lookup
Mains electricity wikipedia , lookup
Opto-isolator wikipedia , lookup
Alternating current wikipedia , lookup
Pulse-width modulation wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Buck converter wikipedia , lookup
Distribution management system wikipedia , lookup
Annexure – 1 to the Tender Enquiry No.DPS/AMPU/MIC/1704 Technical Specification of Electronics for scintillation detector assembly- Model: SDA- 01 CPU/Controller : 16 bit PIC Controller @ 20MHZ Count capacity : 9999999999(10 digits) Acquisition time : programmable in seconds Built-in Memory : EEROM 256Kbytes DATA communication : RS485 port two numbers Pulse Amplifier : Low noise high input impedance input stage to receive negative pulse from photomultiplier anode section of scintillation detector and polarity conversion, Gaussian shaping amplifier with pole-zero cancellation, Software tunable gain amplifier for gamma energy calibration, Buffer stage before window analyzer, Window analyzer with tunable reference, Software tunable Noise reference 0-3V, High voltage : Low power, very low ripple DC-DC converter to generate 300V to 1300V high voltage software tunable, bias for photomultiplier load of 5M, Necessary shielding to eliminate noise interference caused by switching and magnetic circuits of DC-DC converter. Power Requirement : 12V DC @ 50mA or less in full load Operational/Features : remember last set/used operational parameters and work on those parameters till new parameters entered, Acquired data with date and time stamp, stored data erased on demand only, provision to load default settings PMT base resistor chain : Circular PCB with 5.1M/440K resistor chain between dynodes with proper filter capacitor and providing pulse point and HV bias point. Console : All above hardware assembled in moisture proof aluminium /metal unit with two 5pin connectors to connect with Host System/ PC. Enclosure should have provision to accommodate one 2” x 2” NaI(Tl) crystal & Photomultiplier tube integral assembly, above HV and pulse processing circuit, PMT base resistor chain PCB with moisture proof enclosure. Software : Software to provides acquisition of data from detectors and transmit counts/data to the host (BUOA) system / PC, probe software accept the operational commands through RS485 protocol from host system (RTOS)/ PC and execute the routines to acquire data or set the HV bias to photomultiplier tube, change the acquisition time, Auto calibration procedure with a mono energy gamma source etc. Software to be provided with multiple debug messages to check probe error, HV error, Count zero error etc. Necessary mathematical computations need to be included in the software to calculate the sample grade. Software for generation/controlling of the High voltage, counting of digital logical pulses, shaping and processing of detected bipolar spiked signal from scintillation detector into Gaussian pulse with auto gain adjustment with a known gamma source, RS485 interface and power supply circuitries.