Braun MCA166-USB user manual 2 ADC

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6.1.2ADC

1.Successive approximation ADC with sliding scale linearisation

●Channel splitting 128, 256, 512, 1K, 2K, or 4K

●Full input voltage range 3V, positive and negative (10V with external attenuator)

2.ADC Dead time (including time needed to write into memory)

●< 8 µsec

3.Nonlinearities

●Differential nonlinearity (over 95% channel range) <2%

●Integral nonlinearity (over 95% channel range) <0.1%

4.Peak capturing

●Works with pulse of gaussian shaping amplifier (range of shaping time constant between 0.5µs and 5µs)

5.Temperature Stability

●TK 100 (ADC), TK 500 (Amplifier)

6.Discriminators and threshold

●Digital LLD and ULD (allows channelwise cutting)

●Analogue threshold (2...60% of ADC range)

●Multi Channel Scaling (MCS) mode allowing to count the following pulses

●TTL input pulses (minimum width of flat top 0.2µs) not routed through the ADC (maximum rate 1 MHz)

●LLD/ULD counting mode, counting pulses within a preset digital window

●Count rate derived from internal amplifier ICR signal (maximum count rate determined by count rate limitation of amplifier )

●Dwell time 0.01s to 500s

7.Spectrometric performance:

●Resolution (FWHM) for typical 500mm² planar HPGe detector for count rates < 10000cps and a Co-57 source at 122keV:

●610±20eV at 1µs shaping time

●580±20eV at 2µs shaping time

●Peak shift:

< 0.5% for 1µs shaping time and count rates from 1000 to 70000cps

< 0.2% for 2µs shaping time and count rates from 1000 to 40000cps

●deterioration of FWHM < 5% for both conditions

●Throughput in memory:

at least 25000cps in memory at 50000cps input rate and 1µs shaping time

at least 13000cps in memory at 30000cps input rate and 2µs shaping time

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Contents MCA166-USB Exclusion of liability MCA166-USBTable of Contents Appendix Introduction General Description Users safety informationHardware Switching on Power managementCharging the MCA166-USB Connecting the MCA166-USB to a ComputerConnection of detectors Overview Additional external battery pack and Power PackSoftware MCS MS-DOS, WinMCS Windows Spec MS-DOS, WinSPEC WindowsU235 MS-DOS, WinU235 Windows UF6 MS-DOS, WinUF6Identify RateWinSCAN Source Target MCAPlot and MCAPrintMiscellaneous MCA166-USB parameters for use with different detectorsIsotope Half-life Energy keV Branching ratio % Some of the most important photon energiesAmplifier Technical DataMCA166-USB Hardware Specifications 2 ADC Battery Power supplyPreamplifier Voltages High VoltageEnvironmental ratings Mechanical specificationComputer Interface Block Diagram of the MCA166-USB Diagrams and pin connectionsHV-Inhibit mode2 Contact SignalContact Voltage Max. Current Troubleshooting Page MCA166-USB File Content Explanation $ROI File Content ExplanationFile Content Explanation $ENERFIT $SPECREM$PRESETS File Content $ADC$FASTDISCR 400 $SLOWDISCR $INPUT$MCSCHANNELS $POWERSTATE$MCSINPUT $MCSTIME$RECERRORCOUNTER File Content Explanation $RECCOUNTERFile Content Explanation $WINSPECINFO $SPECINTEGRALIcod Analysiscsratio$WINSPECINFO Analysismga$WINSCANINFO File Content Explanation $UF6INSPINFOOUT LOT LOT ID MBAMBA LOT LOT ID File Content Explanation $INSPINFOArea and the Area Uncertainty Function Appendix 2 MCA166-USB algorithm, formulasSmooth CentroidStrip Appendix 3 Description of the communication DLLs8 MCA166-USB A3.1.3 Functions to work with the MCA Mmcastartacquire MmcaresetMmcasetmodemcs MmcasetmodemcaMmcaclearmemory MmcacleartimeMmcasetpresetlivetime MmcasetpresetnoneMmcasetpresetrealtime MmcasetpresetintegralMmcasetroi MmcasetadcresdiscrMmcasetrepeat MmcasetmcschannelMmcasetmcsinputdiscr MmcasetmcsinputicrMmcasetmcsinputttl Mmcasetmcainputamplifierpos MmcasetgainMmcasetmcainputamplifierneg MmcasetmcainputdirectposMmcasetshapingtimelow MmcasetthresholdMmcasetshapingtimehigh MmcasetpileuprejectionMmcasetslow MmcasetfastMMCASETPZCMANUAL18 MMCASETPZCVALUE19Mmcasetstabilisation MmcasetpreamplifierpowerMmcasetstabparam MmcasethighvoltagesMMCASETUF6ROIS MmcasettdfMmcasetuserdata Mmcaqueryuserdata Contents of the Mmca User Date memory21Page Mmcaquerypower Mcastabresult STABSTARTED, Stabactive MmcaquerystateMcamode MODEMCA, Modemcs Mcainputadc Adcamplifier ADC Directpos Adcdirectneg STABIDLE, StaberrorMcainputpol Inputpolaritypositive Inputpolaritynegative DTCMmcaquerysystemdata MMCAQUERYIMAGE36 Mmcaqueryenrichment MmcaqueryspectraMMCAQUERYUF6ROIS MMCAQUERYUF6INFOMmcaquerycentroid MmcaqueryonlineMmcaqueryvoltagecurrent Cmdstart CmdinitCmdstop StatestopModemca Modemcs CmdsetmodeCmdclear Clearmemory = Cleartime Clearroi ClearallPresetnone Presetreal Presetlive Presetint Presetarea CmdsetpresetsCmdsetadcresdiscr LLD, ULDCmdsettimeperchannel CmdsetrepeatCmdsetmcschannel Cmdsetmcainput CmdsetgainCmdsetinputpolarity Cmdsetshapingtime CmdsetmcsinputCmdsetthreshold Cmdsetslow CmdsetpurCmdsetfast Cmdsetpzctimeoffset CmdsetpzcCmdsetstabparam Cmdsetbias CmdsetpreamplifierpowerCmdsetuserdata CmdsettdfCMDSETUF6ROI Cmdquerystate CmdquerypowerCmdqueryspectra CmdqueryimageCmdquerycentroid CmdqueryuserdataCmdsystemdata CMDQUERYUF6ROIS CmdqueryenrichmentAppendix 5 Changing the MCA166-USB Firmware

MCA166-USB specifications

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