GBS Elektronik MCA166-USB User Manual Download Page 15

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5 Some of the most important photon energies

Table 3: Photon energies for different isotopes

Isotope

Half-life

Energy (keV)

Branching ratio (%)

Am241

432.2y

26.34/59.54

2.4/36

Cd109

462.6d

88.03

3.63

Bi214

19.9min,
daughter of
Ra226

609.31

46.09

Ce139

137.64d

165.86

79.87

Co60

5.271y

1173.23/1332.49

99.85/99.98

Co57

271.8d

14.4/122.06/136.47

9.16/85.6/10.68

Cs137

30.07y

661.66

85.1

Eu152

13.3.y

121.77/344.28/778.91/
964.11/1112.07/1408.
00

28.38/26.59/12.98/14.46/
13.57/20.85

Hg203

46.61d

279.19

81.84

Mn54

312.2d

834.82

99.98

Pb214

26.8min,
daughter of
Ra226

241.91/295.09/351.86 7.46/19.17/37.06

Ra226

1600y

186.11

3.28

Sn113

115.09d

391.7

64.89

Sr85

64.84d

514.0

98.4

U235

7.04E8y

143.78/163.37/185.73/
205.33

10.53/4.7/53.15/4.7

Y88

106.65

898.04

Pb fluorescence x-
rays

74.96/72.79/84.99/
87.34

Summary of Contents for MCA166-USB

Page 1: ...Miniature Multi Channel Analyzer MCA166 USB User s Manual Version 3 0...

Page 2: ...ion in this manual has been carefully reviewed and is believed to be accurate and reliable However the GBS Elektronik GmbH assumes no liabilities for inaccuracies in this manual This manual is subject...

Page 3: ...pack and Power Pack 10 3 Software 10 3 1 Overview 10 3 2 SPEC MS DOS WinSPEC Windows 11 3 3 MCS MS DOS WinMCS Windows 11 3 4 U235 MS DOS WinU235 Windows 11 3 5 UF6 MS DOS WinUF6 11 3 6 LENG 11 3 7 RAT...

Page 4: ...6 1 9 Environmental ratings 19 6 2 Diagrams and pin connections 20 7 Troubleshooting 22 APPENDIX 1 MCA166 USB spectral data format 25 APPENDIX 2 MCA166 USB algorithm formulas 32 APPENDIX 3 Descriptio...

Page 5: ...ch support safeguards specific applications as U 235 enrichment verification spectral radiation survey meter mode supporting active length determination are available See chapter 3 for more informatio...

Page 6: ...a damaged wall adapter 2 1 2 High Voltage Supply Make sure that the High Voltage connector and the High Voltage supply cable of the detector are in a good condition before connecting them to the MCA16...

Page 7: ...6 USB for at least several month The remaining battery life time is sufficient to transfer the measured spectrum to a computer It is recommended before reading out the MCA166 USB to connect it to the...

Page 8: ...supplied with the MCA166 3 pin LEMO connector are not compatible with the MCA166 USB Don t try to connect them to the MCA166 USB The connectors are mechanically different 2 2 4 Connecting the MCA166 U...

Page 9: ...preamplifier power supply connector is compatible with the MCA166 USB and that the power consumption does not exceed the maximum ratings see Table 6 Chapter 6 2 Connect the cable for the preamplifier...

Page 10: ...ly integrated in the MCA itself and makes this devices obsolete If more battery capacity is needed please contact GBS Elektronik GmbH 3 Software 3 1 Overview There are several programs to operate the...

Page 11: ...e distributions with any radiation detector HPGe NaI CdTe CdZnTe and neutron counters There are two variants of WinMCS WinMCS I for Inspectors was designed for standard use WinMCS A for Automation was...

Page 12: ...pectra are supported For correct peak search a starting point for the detector resolution and efficiency is assumed based on detector type and size Features includes full master library of gamma lines...

Page 13: ...s a program for converting different file formats Please note that there may be always a loss of information as not all kind of information about the spectrum is supported by every file format The fol...

Page 14: ...ufact HV V 12 V 12V 24V 24 V Input signal polarity Channels Gain for 2 MeV full range Shaping time s CdZnTe SDP Z 60 Ritec 300 x x neg 1024 90 1 CdZnTe SDP Z 20 Ritec 500 x x neg 1024 80 1 CdZnTe CZT5...

Page 15: ...99 98 Co57 271 8d 14 4 122 06 136 47 9 16 85 6 10 68 Cs137 30 07y 661 66 85 1 Eu152 13 3 y 121 77 344 28 778 91 964 11 1112 07 1408 00 28 38 26 59 12 98 14 46 13 57 20 85 Hg203 46 61d 279 19 81 84 Mn...

Page 16: ...ignal corresponding to full ADC scale at minimum gain 3V 10V with external attenuator and input set to direct input With input set to amplifier the maximum voltage step from preamplifier corresponding...

Page 17: ...lowing to count the following pulses TTL input pulses minimum width of flat top 0 2 s not routed through the ADC maximum rate 1 MHz LLD ULD counting mode counting pulses within a preset digital window...

Page 18: ...voltage sign and value by software Calibration within 1 at maximum of bias voltage Maximum current 0 5mA or 0 25W e g 1000V and 0 25mA 6 1 6 Battery Rechargeable Li ion battery with no memory effect...

Page 19: ...ilable on both interfaces proprietary software protocol 6 1 8 Mechanical specification Size 155mm x 95mm x 45mm footprint of palmtop HP200LX Weight app 700g incl battery 6 1 9 Environmental ratings Ra...

Page 20: ...MCA166 USB 6 2 Diagrams and pin connections Figure 3 Block Diagram of the MCA166 USB 20...

Page 21: ...tact Signal 1 5V USB 2 D USB 3 D USB 4 GND 5 RxD RS232 Input 6 TxD RS232 Output Table 6 Preamplifier Power Supply Connector D9 female Contact Voltage max Current 1 GND 2 GND 3 4 12 V 60mA 5 HV Inhibit...

Page 22: ...MCA firmware programming switches are in a wrong position The firmware programming switches must be all in off position Do not play around with them 3 MCA lamp flashes irregularly Computer tells MCA...

Page 23: ...hed off Check the signal from the preamplifier If the preamplifier signal rise time is slower than 500ns then there is the danger that regular pulses especially the large ones are misinterpreted as pi...

Page 24: ...to ground or to mains voltages Try a different computer laptop palmtop Winding the cable to the detector computer several times around a ferrite ring also may help 13 While opening a spectrum the MCA...

Page 25: ...MCA_166_ID Mini MCA module identification SN 5 Serial number HW 9503 Hardware version FW 9619 Firmware version SPEC_REM Notes about the spectrum Mini MCA MCA166 USB Remarks from the operator prompted...

Page 26: ...of ADC channels 2 60 possible GAIN_VALUE Amplifier gain 200 Coarse gain 2 1000 1 0261 Fine gain 0 5000 1 5000 DTC Shaping Time 1 1 2 s3 4 0 Actual shaping time4 INPUT ADC input source and polarity Amp...

Page 27: ...2V preamplifier power supply from the battery I 24 0mA Input current of the DC DC converters for 24V preamplifier power supply from the battery I 24 1mA Input current of the DC DC converters for 24V p...

Page 28: ...on information of applications written by the Research Center Rossendorf or the GBS Elektronik GmbH WinSPEC Inspection information if no extern analysis application or MGAU is attached FILE CONTENT EX...

Page 29: ...ter Filter WinSPEC inspection information if MGA is attached FILE CONTENT EXPLANATION WINSPEC_INFO WinSPEC inspection information ANALYSIS MGA Extern analysis application attached with WinSPEC 1999 00...

Page 30: ...ID 3478 384 Motor controller ID 3456 419 System ID 2578 456 External amplifier ID 1000 150 Gain coarse fine 0 000 Time constant OUT Output Good measurement Remarks UF6 WinUF6 inspection information FI...

Page 31: ...ility code MBA MBA LOT LOT ID 4 6 10mmAl Sample ID 4 462 Declared enrichment 0 003 Declared enrichment uncertainty wt Scale unit wt weight percent or At atom percent 1 200 Wall thickness 0 012 Wall th...

Page 32: ...ckground area is determined by averaging 4 points on both sides of the peak the ROI limit points and 3 outer points and linear fit Area Integral Background Background 3 3 8 1 end end begin begin ROI R...

Page 33: ...he half maximum channel It is now made sure that the following channel e g 1204 also falls below the half maximum channel The same algorithm is applied for the other side of the peak The left and the...

Page 34: ...rumy Count content of channel i in the original spectrum F Strip factor Spectrumx Count content of channel i in the spectrum to be subtracted E calibration The Energy calibration allows to convert the...

Page 35: ...ady using this one Before you exit your program you have to close the serial communication port so that it can be used from other programs now You can use only one communication port at the same time...

Page 36: ...T CMD_SET_MCS_INPUT 1 INPUT_POLARITY CMD_SET_INPUT_POLARITY 1 USER_DATA CMD_SET_USER_DATA 2 SET_MEASURE_PZC CMD_SET_MEASURE_PZC 2 QUERY_POWER CMD_QUERY_POWER 0 QUERY_STATE CMD_QUERY_STATE 0 QUERY_SPEC...

Page 37: ...data transfer ERROR_INVALID_PARAM 4 invalid parameter A3 1 3 Functions to work with the MCA For the work with the MCA a lot of functions are available You can subdivide all functions in five groups F...

Page 38: ...r flag Repeat mode flag Trigger flags integer value 0 leaves spectrum and times unchanged the start time is ignored 1 spectrum and time are cleared 2 Repeat Mode 110 MCA MCS 3 Repeat Mode 211 MCA 4 Re...

Page 39: ...topped and the spectrum is cleared Parameter Results Return Code see MMCA_RESET command Name MMCA_CLEAR_TIME Description The acquisition is stopped and the dead time together with the real time are se...

Page 40: ...ET command Name MMCA_SET_PRESET_REAL_TIME Description The command sets the time for measurement 1 Parameter Real time integer value 1 65535 Results Return Code see MMCA_RESET command Name MMCA_SET_PRE...

Page 41: ...nteger value LLD end ULD Results Return Code see MMCA_RESET command Name MMCA_SET_REPEAT Description The command sets the number of sweeps for repetitive measurement 1 Parameter Sweeps Integer value 0...

Page 42: ...e external TTL signals as MCS input Parameter Results Return Code see MMCA_RESET command Name MMCA_SET_MCS_INPUT_DISCR Description The command selects the software discrimination of ADC input pulses a...

Page 43: ...r Results Return Code see MMCA_RESET command Name MMCA_SET_MCA_INPUT_AMPLIFIER_NEG Description The command sets the amplifier input polarity to negative Parameter Results Return Code see MMCA_RESET co...

Page 44: ...ee MMCA_RESET command Name MMCA_SET_SHAPING_TIME_HIGH Description The command sets the amplifier shaping time 2 s 17 Parameter Results Return Code see MMCA_RESET command Name MMCA_SET_PILE_UP_REJECTIO...

Page 45: ...teger value Return Code see MMCA_RESET command Name MMCA_SET_PZC_VALUE19 Description The command sets the PZC value 1 Parameter PZC value integer value 0 2499 Results Return Code see MMCA_RESET comman...

Page 46: ...sation time Integer value default 10 sec interval 2 Parameter Stabilisation area long value default 25000 Results Return Code see MMCA_RESET command MCA Detector Power Commands Name MMCA_SET_PREAMPLIF...

Page 47: ...lue in the MCA parameter memory 1 Parameter Number integer value 0 63 2 Parameter Value long or float value 0 Results Return Code see MMCA_RESET command Name MMCA_SET_UF6_ROIS Description The command...

Page 48: ...0 1 2 123 Byte Offset 22 HV Preset value 0 3000 Byte Offset 24 Power Switches Byte Offset 28 Stab Preset auto Channel Byte Offset 30 Stab on off Byte Offset 32 Repeat Mode 0 1 2 3 4 100 100 means sof...

Page 49: ...pair Byte Offset 12826 U235 UF6 Inspection description WinMCS 16 ROI pairs of the MCA spectrum similar the other ROIs 25 In applications with MCS spectrum the ROIs of the MCS spectrum are saved here...

Page 50: ...r Switches long value 0X80 24V ON 0X40 24V ON 0X20 12V ON 0X10 12V ON 0X02 HV ON Byte Offset 52 Charger current mA long value Byte Offset 64 Battery current mA at stop long value Byte Offset 68 HV pri...

Page 51: ...yte Offset 42 ULD integer value Byte Offset 44 ROI begin preset integral area integer value Byte Offset 46 ROI end preset integral area integer value Byte Offset 48 Amplifier coarse gain integer value...

Page 52: ...er value Byte Offset 92 MCS Channels integer value Byte Offset 94 Last power state integer value Byte Offset 96 Battery capacity integer value Byte Offset 98 0 integer value Byte Offset 100 Start time...

Page 53: ...56 Elapsed sweeps long Byte Offset 60 Busy time ms of previous sweep long Byte Offset 64 0 integer Byte Offset 66 Peak detect counter of previous sweep 48 Byte Offset 72 0 integer Byte Offset 74 Fast...

Page 54: ...rn Code see MMCA_RESET command Name MMCA_QUERY_IMAGE36 Description The command read the MMCA spectrum image 120x256 1 Parameter No of 1 Channel 0 2 Parameter Compress factor 1 32 3 Parameter Vertical...

Page 55: ...Peak end integer value begin end ULD end begin 250 3 Parameter Background begin integer value LLD begin end 4 Parameter Background end integer value begin end ULD end begin 250 Result array Begin pea...

Page 56: ...gin and end of the 3 ROIs Parameter Result array Begin ROI 1 long value Byte Offset 4 End ROI 1 long value Byte Offset 8 Begin ROI 2 long value Byte Offset 12 End ROI 2 long value Byte Offset 16 Begin...

Page 57: ...mca32cmx dll The DLL must reside in the system directory of Windows or in the same directory as the calling application In order to include the DLL in your program you have to use the in Visual Basic...

Page 58: ...meter cf the command clears the spectrum and the time or not and then the measurement will be started If the first parameter is not equal zero the spectrum and the time where cleared and the second pa...

Page 59: ...p value coarse_gain fine_gain mca_input_pol mca_input_adc Affected setup value mca_mode stab_state MCA state STATE_READY MCA Clear Command Command name CMD_CLEAR Description A running measurement is s...

Page 60: ...command sets the choice pre PRESET_NONE 0 PRESET_REAL 1 PRESET_LIVE 2 PRESET_INT 3 PRESET_AREA 4 and value val of the preset The parameter val must be lower then 65536 for PRESET_REAL and PRESET_LIVE...

Page 61: ...Command syntax Format integer integer integer long integer Parameter preamble command ch 0 end flag Byte String HEX A5 5A 63 00 chl chh 00 00 00 00 B9 9B Used setup value None Affected setup value mc...

Page 62: ...ity for the internal amplifier ip 0 positive input signals ip 1 negative input signals Command syntax Format integer integer integer long integer Parameter preamble command ip 0 end flag Byte String H...

Page 63: ...he analogue threshold value thr 2 60 Command syntax Format integer integer integer long integer Parameter preamble command thr 0 end flag Byte String HEX A5 5A 47 00 thr 00 00 00 00 00 B9 9B Used setu...

Page 64: ...riminator threshold 0 2499 default 400 Command syntax Format integer integer integer long integer Parameter Preamble command fast 0 end flag Byte String HEX A5 5A 50 00 fast 00 00 00 00 00 B9 9B Used...

Page 65: ...lue pzc_value Results If pm 0 the function returns with the number of counts and the PZC offset MCA state STATE_READY Command name CMD_SET_PZC_TIME_OFFSET Description The command sets the time offset...

Page 66: ...and fl rb re end flag Byte String HEX A5 5A 4D 00 fll flh rbl rbh rel reh B9 9B Used setup value channels lld uld Affected setup value stab_state stab_roi_begin stab_roi_end MCA state STATE_READY Comm...

Page 67: ...mplifier_power MCA state STATE_READY Command name CMD_SET_BIAS Description The command sets the detector high voltage42 and controls the HV inhibit input hv 0 3000 i 0 Inhibit off i 1 Canberra or DFG...

Page 68: ...ber b LLD b e e b e ULD e b 500 Command syntax Format integer integer integer integer integer integer Parameter Preamble command r b e end flag Byte String HEX A5 5A 64 00 r 00 bl bh el eh B9 9B Used...

Page 69: ...ECTRA Description The command reads the spectrum data n No of 1 channel and buffer control Bit 15 12 c Compress factor 1 32 Command syntax Format integer integer integer long integer Parameter preambl...

Page 70: ...the special MCA data Command syntax Format integer integer integer long integer Parameter preamble command 00 End end flag Byte String HEX A5 5A 62 00 00 00 00 00 00 00 B9 9B Used setup value Result s...

Page 71: ..._UF6_INFO Description The command reads current dead time real time the integral begin and end of the UF6 ROIs Command syntax Format integer integer integer long integer Parameter preamble command 0 0...

Page 72: ...e destroyed The programming voltage 12V shall only be applied when the working voltage 5 V is switched on Each MMCA must be programmed with it s corresponding HEX file e g MMCA 6 with Mca6 hex Program...

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