Documentation site for the design of electronics for the 25Kg CDMS experiment

General Info

Electronics board

Meetings Info

· Front End Board Specifications

· QET bias noise specs for CDMS-II

· Front End Board Cost Estimate

· Soudan Settings from Dan

· APEX Squid Amp

· Squid Front End simplified diagram

· Charge amp simplified diagram

· LT1683 DC to DC data sheet

· New E-stem plate schematic

The following are for the analog feedback variant

· Electronics Block Diagram

· Analog section

· Digital section

· CPLD Control Settings

· Control Settings Configuration Mod1

· FPGA Register map

· Errata for new board design

· Example digitized charge-channel pulse

· DCRC V2 analog section schematic

· DCRC V2 digital section schematic

· November 30 Electronics Upgrade meeting

· October 18, 2006 meeting

· January 26, 2007 meeting

· March 30, 2007 meeting

· May 25, 2007 meeting

· July 27 2007 meeting

· August 24 2007 meeting

· October 30, 2007 meeting on DCRC V2 changes

· November 16, 2007 meeting

· December 21, 2007 meeting

· February 1, 2008 meeting

· March 7, 2008 meeting

· May 16, 2008 meeting

Elog and e-mail archive

Test results

DCR Soudan test

March 2007 test at Berkeley fridge

Lists

DAQ specs
Electronics-related cryogenics items
List of things to do with DCRC v1
Changes for DCRC v2
Test facility list from Dennis
Software: We think it's good to have VIs that have a different focus - the DetetctorControl vi supports all functions of the card for card level work, the modular vi's focus more on setting up a detector, and things like SQUETtest focus on an even higher level.

Incorporate DCRC control into the existing ZIPFEBmodular Vis. Jeter agreed to take care of adapting the modular VIs (Dennis had been planning to do it)
Keep developing DetectorControl.

Version control for labview vi’s:

Subversion with Labview? See discussions here.
See LVDiff.
Perforce is the smooth commercial version for all platforms.

DAQ and electronics development for the test-stands

Incorporate DCRC control into DarkScript and LightEvent for TF operations.

DCRC documentation.

Draw functional diagram of DCRC SQUID circuit
FEB-DCRC comparison

Begin user guide.
Document FNAL test procedure
Begin developing production testing (at least summarize present tests so TF folks know what has been checked and what hasn't)

Develop board calibrations jig and software
Fedup board
QET Isolator board
Veto panel board
R&D projects

Electronics for AC-biased readout, needed for symmetric detectors: Talk, e-book note (Jeff Filippini)
Time dependant electric field
Cold hardware changes to improve phonon resolution?

Old:

Check-list of things to do for test-stand test

Gerber files for analog feedback variant are here.

Free Gerber viewer is available at www.graphicode.com. To use:

1. Unzip gerber files

2. Start viewer

3. Choose File -> import…

4. Select all the unzipped files and click OK

Sorry, it’s for PC only. We’ll add a link here if someone finds a mac version able to view these files.

Analysis of SuperCDMS Electronics

· Spice simulations, increasing VGA gain: trace1, trace2, trace3, trace4 -Sten

· Squid error signal and loop response -Kyle and Dennis

· Symmetrizing ZIP detectors – phonon readout on both sides -Jeff Filippini + UCB

Analysis of CDMS II electronics

· Summary of Soudan electronics settings -Jeter Hall

· Calculating phonon noise spectra -Walter Ogburn

· Noise measurements in charge channels. -Kyle Sundqvist

· Some Quicktime illustrations of noise vs. temperature -Kyle Sundqvist

· Notes and diagrams on charge amp validation -Kyle Sundqvist

· A quick look at charge noise with cryocooler on and off -Long Duong
This log book entry shows the low-frequency noise is not from the cryocooler

· DAQ 60 Hz Resolution -Long Duong
Log book entry demonstrating a DAQ mode with 60 Hz resolution

· Monitoring feedback offsets -Kyle Sundqvist

· Determining the Resistance of the Qinner Electrical Short at T5Z2 Input

See also UCB test results
-Seitz & Sundqvist