Work Package 6: Electronics
and Data Acquisition system - design and implementation
Figure
1: Photos of voltage preamp:110x130x40 mm, weight is 200g.
Figure
2: 2-D Resistive Anode Encoder: position information
Figure
3: HDA and PSD electronics including new preamp and DSP unit.
Figure
4: DAQ dead time correction measurement. Practically no dead time observed til about 100kHz count rate after which sudden saturation occurs.
Description of work package
Work Package
6
Start:
Month 1
Finish:
Month 18
Cost:
Title:
WP6:
Electronics
and Data Acquisition system -design and implementation
Description:
Research Teams:
RT1, RT2, RT3
6.1 Detectors
electronics: Design, purchase, and assembly: The pulses from the electron detectors of the
spectrometers are processed through a system of preamps, shaping amps,
logical gates and ADCs which will have to be redesigned and whose components
must be bought. Spectrometer electrode voltages are delivered by programmable
precision high voltage power supplies and coordinated with the detector
signals through the data acquisition system (DAQ) centrally controlled by a
PC. Both DAQ and power supplies must also be bought as well as related high
voltage vacuum feedthroughs, SHV and MHV connectors, HV cabling etc.
6.2 Design and development
of data acquisition (DAQ) systems for channeltron and PSD: DAQ
software must be written for the purchased DAQ. Two different types of DAQ
programs will be used either to scan the spectrometer voltages with the
channeltron detector or keep the voltages fixed when used with spectrograph’s
position sensitive detector (PSD). Eventually both will be combined in one
program.
6.3 Tests of complete
electronics and DAQ with pulsers:
Tests of the electronics will be performed with pulsers, Eventually, improvements
in the counting rate capabilities of the Kansas system [Ben99b] and dead time
minimization will be sought using histogramming memory electronics or
delay-line electronics
Deliverables:
2
Reports and part of BS, MS or PhD thesis, DAQ software programs
WP6: Table of Activities in progress
Completed
Activity
Target Date
Tested 3 Tennelec 3kV power
supplies for the HDA
Dec 2013
Tender for DAQ
announced - ended unsuccessful
Dec 2013
1rst Tender to buy computer
equipment ended unsuccessful
Jan 2014
Consider High precision low
ripple HV power supplies
Jan 2014
Consider floating HV power
supply for MCP and channeltron
Jan 2014
Consider Data acquisition
(DAQ) system
Jan 2014
Build appropriate MCP storage
vacuum chamber
Jan 2014
Tender for MCP plates for PSD
announced 5/2/14
Feb 2014
2nd Tender to buy computer
equipment announced on 5/2/14
Feb 2014
Buy computer equipment and
peripherals (first PC ordered in tender - rest will go out in
new tender in April)
Feb 2014
Buy DAQ (DAQ is presently
being build at ATOMKI according to specs - will be ready end
of April)
Feb 2014
Buy HV power supplies for
HDA (bought HMI and Applied kV
power supplies) and MCP (bought 3kV floating
HP 6515A unit)
Feb 2014
Consider other needed electronics:
NIM crate, test pulser, Oscilloscope (have
already one NIM crate and in the process of a tender for another
- existing test pulser repaired)
Mar 2014
DAQ electronics (preamp and
DSL card) tested OK - still need to test dead time and overall
control of DAQ system
May 2014
DAQ with first electron measurements
from hot wire tested OK
May 2014
Test voltage control for HDA
power supplies together with counter and DSP (Fasmatech)
Sep 2014
Develop and test new software
for DAQ (Fasmatech)
Nov 2014
Channel 1 of preamp dead! - replace with channel 5 - need
to repair - arrangement with ATOMKI under discussion!
Jun 2015
Preamp unit sent to Hungary and
repared at ATOMKI and returned to lab
Aug 2015
Final Report on operation
of DAQ ready - work package completed
