BTeV RICH HV System

The RICH HV System Power One 24V – 1.2A TNG Matsusada HVPS HPD

TNG Calibration  TNG: “totally neat gadget”, RS232 standard, 4 channels, 13-bit ADC.  Slope: 0.609, 0.610, 0.610, mV.  Offset: 3.49, 1.75,  0.87, 0.50 mV.

TNG Calibration: Special Features  Weird structure in channel 2: ( understood finally ) Slope = , Step = n  100.  Channel 3 & 4: integrated non-linearity ~ 0.1 mV.

High Voltage Test TNG HVPS A 24V PS A 1.8/2.8 G  V V 10 M 

HVPS Gain  The output load resistance smaller than HPD.  Gain difference: 0.24% (depends on load).

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.

Consumption of Power Most of the power is consumed by converter!

Input Current

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)

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 : $2.02 (>100)  Buckhead adapter 83-1F: $16.41(>100)  Cost: 711  $  $   $5,  Estimation of total budget: ( $31,000)

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?

13-bit DAC TNG Alarm Relay Matsusada HVPS 5G 0.5M +_+_ +_+_ A 24V PS 120V AC k 0. 1 m F To HPD To PC Analog inputs V control +24V HV out V out TNG RS232 Matsusada HVPS +_+_ k 0. 1 m F V control +24V HV out Matsusada HVPS +_+_ 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