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, 0.612 mV.

Offset: 3.49, 1.75, 0.87, 0.50 mV.

TNG Calibration: Special Features

Weird structure in channel 2: ( understood finally )

Slope = 0.610043, Step = n100.

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

10M

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 c

ontr

ol (

05V

)

HV Cable and Connector

Cable: Belden 8267 (RG-213/U) Price (Newark): $842/1000ft (611 for N>25)

We need: 100032ft + 793100ft 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 +23716.41 $5,697.48

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-bitDACTNG

Alarm

Relay

MatsusadaHVPS 5G0.

5M

A

24V

PS

120V AC

0.1

47 k

0. 1F To HPD

To PCAnalog inputs

V control

+24V

HV out

V out

V out

TNG

RS232

MatsusadaHVPS

0.1

47 k

0. 1F

V control

+24V

HV out

MatsusadaHVPS

0.1

47 k

0. 1F

V control

+24V

HV out

VSPI

Digital I/O

5G0.

5M

A To HPD

V

5G0.

5M

A To HPD

V