BTeV RICH HV System

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BTeV RICH HV System
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The RICH HV System
Matsusada HVPS
TNG
HPD
Power One 24V 1.2A
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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
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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/kW for 1.8 GW load.
• 33.1/kW for 2.8 GW load.
• Output current slopes
• 1.06/kW for 1.8 GW load.
• 0.95/kW for 2.8 GW 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
TNG

• 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.

Matsusada HVPS
V control (0-5V)
HPD
Power One 24V 1.2A
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HV Cable and Connector

• Cable Belden 8267 (RG-213/U)
• Price (Newark) 842/1000ft (611 for Ngt25)
• 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 (gt500)
• Buckhead receptacle 83-878 2.02 (gt100)
• Buckhead adapter 83-1F 16.41(gt100)
• 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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47 k
Matsusada HVPS
V control
A
HV out
0. 1mF
To HPD
13-bit DAC TNG
V out
5G
TNG
24V
Analog inputs
To PC
0.1
V
0.5M
RS232
SPI
Digital I/O
V out
47 k
Matsusada HVPS
V control
Relay
A
HV out
0. 1mF
To HPD
5G
24V PS
24V
0.1
V
0.5M
Alarm
47 k
Matsusada HVPS
V control
A
HV out
0. 1mF
To HPD
5G
24V
0.1
V
0.5M
120V AC