TCT Data Aquisition

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General Comments:

• For the DESY analysis program always start voltage scans at 0V and the go to higher voltages (or lower when applying negative bias).
• Only use every voltage once when using DESY analysis program
• always press rear at power supply (not done automatically)

General Settings

• Byte order: default setting 2 should be used
• Time between moves: 0.1s recommended
• DRS capable of taking around 300 wavefroms per second
• dont highlight whole cell in position moving window when reset position, it will move to the old value, but sets it as 0!

Laser:

• For 'Particulars LASER control' only switch tab when laser is OFF, otherwise programm crash -> switch power off and on to controll it again.
• signal from amplifier very high: reach limit of DRS input
  • close iris to reduce signal
  • Gregor recommends to have the iris at ~0.8cm (fixed)
  • there is a 'neutral density filter' NDF which attenuates the laser by factor 10
  • when setting the pulse width, don't press 'Disable DAC' after changing to the new value

HV-CMOS:

H35DEMO (2017)

with "Ettore PCB"

position H35DEMO, 2E13 (09/10/2017)

	PSTCT position	comment
X	30210
Y	38000	not focused
Z	19590

positions 24/08/2017

	PSTCT position	comment
X	30303
Y	35995
Z	19600

LFoundry chip (2017)

positions 22/03/2017

	PSTCT position	comment
X	30555
Y	35800	after focus scan
Z	19900 - 20050	when focussed

H35DEMO

• useing eTCT configuration with HV-CMOS PCB (90 degree angle mount, laser height block)

positions after reset 0, as recommended in Particulars manual

	PSTCT position	comment
X	34117.7
Y	34800 - 37600	focus position
Z	19700 - 20100

positions 21/02/2017

	PSTCT position	comment
X	33830
Y	36000	after focus scan
Z	19800 - 20000	when focussed

Comment: waveform not good (too long) which affects data quality and focus scan precision; also in the most recent scans the double junction was not fully visible

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-- SvenWonsak - 26 Nov 2014