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HBD Gas System and Monitoring

HBD Gas System and Monitoring. Craig Woody BNL. HBD Working Group Meeting December 8, 2004. Proposed HBD Gas System. L.Kotchenda. CF 4 output gas collected, compressed, purified and reused. Company Name. Purchases Cost. Dwyer Instruments. $3 740.00.

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HBD Gas System and Monitoring

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  1. HBD Gas System and Monitoring Craig Woody BNL HBD Working Group Meeting December 8, 2004

  2. Proposed HBD Gas System L.Kotchenda CF4 output gas collected, compressed, purified and reused C.Woody, HBD Working Group Meeting, 12/8/04

  3. Company Name Purchases Cost Dwyer Instruments $3 740.00 Tescom $1 100.00 Ashcroft Aprx.$800.00 ADI $2 000.00 RXI $3 930.00 Omega Engineering, Inc $108.00 Peter Paul Electronics Co $1 094.00 Khan $3 500.00 Miller Energy Inc $5 950.00 Asco $169.00 Swagelok $4 021.10 Newark $810.00 Matheson Aprx.$2 500.00 Hastings Instruments Aprx.$4 800.00 Agilent $1 368.00 National Instruments Aprx.$3 490.00 Total $39 380.1 Gas System Costs Two Racks -~$1500 Computer -~$1500 500L buffer cost - $2 500.0 The labor cost is $ 15 000 . Total: ~ 60 000.00 (without pipes) L.Kotchenda C.Woody, HBD Working Group Meeting, 12/8/04

  4. Beam Splitter Beam Splitter Gas Cells MgF2 Windows Gas Cells Mirrors MgF2 Windows Input gas Mirrors Mirrors Input gas Output gas HBD East Output gas HBD East Output gas HBD West Shutters Output gas HBD West Reference Reference MgF2 Windows CsI Photodiodes MgF2 Windows Focusing elements Focusing elements D2 Lamp D2 Lamp CsI Photodiode Monochromator Monochromator Single Readout Individual Readout Gas Transmission Monitoring • Measure UV transmission of input gas and output gas of each detector half separately • Spread beam and separate into four optical paths • Maximize beam intensityso can (hopefully) use CsI vacuum photodiode (or tetrode, etc..) as readout device(s) • Built mainly from commercial parts Cost ~ $40K C.Woody, HBD Working Group Meeting, 12/8/04

  5. CsI QE Monitoring • Install UV lamp(s) inside detector • Run detector in reverse bias mode and measure DC current (special calibration mode) • QE monitoring only done rather infrequently (every few weeks ?) C.Woody, HBD Working Group Meeting, 12/8/04

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