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BTeV RICH HV System
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The RICH HV System Power One 24V – 1.2A TNG Matsusada HVPS HPD
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TNG Calibration TNG: “totally neat gadget”, RS232 standard, 4 channels, 13-bit ADC. Slope: 0.609, 0.610, 0.610, 0.612 mV. Offset: 3.49, 1.75, 0.87, 0.50 mV.
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TNG Calibration: Special Features Weird structure in channel 2: ( understood finally ) Slope = 0.610043, Step = n 100. Channel 3 & 4: integrated non-linearity ~ 0.1 mV.
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High Voltage Test TNG HVPS A 24V PS A 1.8/2.8 G V V 10 M
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HVPS Gain The output load resistance smaller than HPD. Gain difference: 0.24% (depends on load).
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Consumption of Power I output,convert is the portion of input current that consumed directly into output current. Input current slopes: 35.0/k for 1.8 G load. 33.1/k for 2.8 G load. Output current slopes: 1.06/k for 1.8 G load. 0.95/k for 2.8 G load. Current difference at 4V (~20KV output): 7.5 mA for input current. 0.5 mA for output current.
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Consumption of Power Most of the power is consumed by converter!
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Input Current
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The RICH HV System Power One 24V – 1.2A TNG Matsusada HVPS HPD Matsusada HVPS provides “ultra low ripple” (3 mV peak to peak), and suitable output voltage (0 ~ 30 kV). HVPS control voltage provided by TNG (Totally Neat Gadget), Labview based control program done. Power provided by a 24V DC power supply. We tested one HVPS with simulated load to check linearity and ideas on control and measurement. HV cable and connectors are under investigation. Noise rejection rate need to be studied. Schematic layout of HV system done and need optimization. V control (0 5V)
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HV Cable and Connector Cable: Belden 8267 (RG-213/U) Price (Newark): $842/1000ft (611 for N>25) We need: 1000 3 2ft + 79 3 100ft 30,000 ft Cost: 30 $842 = $25,260 ($18,400) Connectors: Amphenol Coax connector 83-1SP-1050: $1.87 (>500) Buckhead receptacle 83-878: $2.02 (>100) Buckhead adapter 83-1F: $16.41(>100) Cost: 711 $1.87 + 237 $2.02 +237 16.41 $5,697.48 Estimation of total budget: ( $31,000)
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To Do How to measure the output currents and voltages? Noise rejection rate the quality of 24V PS. HV cable. Crate cage: ~$250. Meters and other parts. Do we need alarm?
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13-bit DAC TNG Alarm Relay Matsusada HVPS 5G 0.5M +_+_ +_+_ A 24V PS 120V AC 0.1 47 k 0. 1 m F To HPD To PC Analog inputs V control +24V HV out V out TNG RS232 Matsusada HVPS +_+_ 0.1 47 k 0. 1 m F V control +24V HV out Matsusada HVPS +_+_ 0.1 47 k 0. 1 m F V control +24V HV out V SPI Digital I/O 5G 0.5M +_+_ A To HPD V 5G 0.5M +_+_ A To HPD V
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