Page History

This pages collects links and information on the studies done so far at SLAC for Thermal Testing (and related instrumentation).

If anything is unclear, please contact vcairo@slac.stanford.edu.

Thermal Analysis (July 30th 2021):

Please, take a look here https://gitlab.cern.ch/slac_itk/thermalimageprocessing and if you have questions, drop an email to valentina.maria.cairo@cern.ch

Summary of RTD routing, orientation of the heaters, RTD module debugging (May 6th 2021):

https://cernbox.cern.ch/index.php/s/uJ9cUjJ4Cjf2bwN

Summary of RTD calibration (April 2021):

https://cernbox.cern.ch/index.php/s/YwALbwv7fKJ9AWQ

Test on Bare Local Support with active cooling system (July 8th 2020):

Picture

Description

Image Added

Local Support at the start of the cooling process (2:43 pm, 7/8/20).

The minimum temperature read in the local support is about -3 ºC.

To understand the structure, please compare the IR camera picture with the picture below from the visible light camera.

Image Added

Detail of the handling frame.

Image Added

Local Support after about half an hour of cooling on (3:24 pm, 7/8/20).

The minimum temperature read in the local support now is about -40 ºC.

View file

name	thermalVideo_1594244631623.mp4
height	250

Video of the IR camera view while moving it with the Gantry system.

Status of IR camera readout and offline analysis (as of May 21st 2020):

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A TIFF file containing all the info is saved and can be read in the offline image processing, which was developed. This is able to identify the heater out of a certain background through contour finding (tested on a single Peltier and on CAD sketches, will be fully tested once back at SLAC) and return temperature distributions. It was validated against temperature read in from an RTD. See slides below for more details.

An alternative read-out system with built in calibration functions to read the camera directly from a computer and get rid of the phone is being developed in parallel.

Status of RTD readout (as of May 21st 2020):

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1 four-wire RTD module is also available (this could be used to read in the cooling plant RTDs and get rid of the current Labview based system).

Status of Monitoring (as of May 21st 2020):

The monitoring system developed for the B33 low-temperature freezer (used for thermal-conductive glue storage) can be used to read in and monitor the P19-0 RTDRTDs.

One An example with a single RTD was tested quickly before the shutdown, it will be fully tested once access to the lab is permitted again.

Link to Webpage: https://www.slac.stanford.edu/~vcairo/

Link to Grafana page: http://atlascr:3000 (se slides below on Monitoring System for login instructions).

Status of DCS/Interlock (as of May 21st 2020):

To be checked. Latest presentation here.

Status of equipment for P19-0 testing (as of May 21st 2020):

Item	Power Supplies	RTDs	RTD NIM modules	IR Cameras	Phone	Heaters	Gantries
Quantity	4

PS available View filename

, more precisely 1 (60V, 3.3 A) and 3 (40V, 5 A).

1696_98_datasheet.pdf

height

250

~50	5 three-wire plus 1 four-wire	2	1	Enough wired single and quad heaters to load a ring and a stave (see excel document below for details).	2
Notes

1 60V (3.3 amp) and 3 40V (5 amp).

The preferred (low current) configuration is 4 powering lines: 2 lines on each side of the ring, 1 for the quad and 1 for the single. The ideal would be to get 2 identical power supplies for the quads and 2 for the singles, while right now we have one of a type and 3 of another.

ready to be wired appropriately for the test box patch panel (which has connectors HD15 F), will be done by the Electronic lab

the 1 four-wire can be used for the CO2 plant

1 is (probably) faulty

Samsung S 7 (link)

More available (to be wired)

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Installed in the test box

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First tests with IR camera #1 https://indico.cern.ch/event/881601/#11-heaters-and-test-box-equipm

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