Documentation

NLCTA Proposal: version 1 2

Slides from Takashi on checking Gaussian approximation with EGS simulation - link

Collimator scattering at JLab - link

NLCTA beam test slides from Pelle - link

Beam parameters - 500um beam spot

Beam parameters - 150um beam spot

Operation

Log book

Operation plan:

• Start with 5 foils (or maximum) and lowest current available to time in detector readout
• 10Hz beam for each setting of beam intensity, foil thickness and bias voltage (5 min each)
• Run baseline (1000k events at 100Hz) and save to file for each setting (2min)
• Total time would be about 7mins/setting
• Going from 5 foils to 0 foils changes e/strip with a factor of 2

Foil thickness = 5:

Time: 25x7min=175mins

DAQ Desktop Setup

IP address: 172.27.244.72

ttyS0: ibootbar
ttyUSB0: BK
ttyUSB1: keithley

Power Supply Operation

dataprobe iBootbar

Manual

1. old three-output
2. BK
3. keithley
4. PC
5. monitor

Serial: 115200 8N1

Common commands:
"get outlets" - list all outlets
"get outlet X" - list outlet X
"set outlet X on/off/cycle" - turn on/off/cycle outlet list outlet X

Keithley 2400

Manual
Serial: 9600 8N1

Common commands:
"measure?" - returns [voltage, current, ]
"source:voltage?" - returns voltage
"source:voltage 10" - set to 10 V
"output on" - output on
"output?" - returns 1 for on, 0 for off
"source:voltage:range up/down" - change range for voltage setting

BK Precision 1697

Manual
Serial:

Common commands:
"SOUT000" - enable output
"SOUT001" - disable output
"VOLT00XY.Z" - sets voltage to XY.Z Volts

Lab prep

GIMP current vs bias

460V-5.2uA (minutes to get down that low and still decreasing)
500V-5.7uA-3.6uA (20mins)