Detector Maintenance and Upgrade Plans
Explore the plans for evaluating and replacing faulty tubes/modules in detector systems, as well as upgrading preamp electronics for better performance. Coordination with other installation efforts is essential for successful implementation.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
You are allowed to download the files provided on this website for personal or commercial use, subject to the condition that they are used lawfully. All files are the property of their respective owners.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.
E N D
Presentation Transcript
Prop. Tube basic design 2 X and 2 Y layers, coverage 250 * 250 cm Aluminum drift tubes for good position resolution track matching to Station 3 drift chambers Each plane constructed of 2 staggered rows of 2 diameter tubes for excellent efficiency and reasonable channel count End view of a 16 tube module Nanometrics amplifier / discriminator electronics with ECL output. Option for more modern electronics with LVDS output (<50$/chan) Well tested design with 1000 s of operational tubes. Works with a variety of gas mixtures @ ~ +2300V 2
Prop tube front end readout A module consists of 2 staggered rows of 8 tubes, 16 tubes total ~ 4 X 16 X 12 Each tube is 2 X 12 with 20 sense wire at +HV Each module is readout with a Nanometrics N-277 amp/disc card using +-5V power Close-up of one 16-channel module 3
Prop tube status as of July 1st 2017 19/576 dead channels 10/576 low efficiency channels The modules on the edge of P1H and center of P2H are particularly bad since they create holes (false asymmetries) in the acceptance 2 different versions of N-277s (different gain) were used. We run out of spares for both 4
Plans on the detectors Evaluate the status of the spare on the corner of the loading dock Identify the bad tubes/modules and replace with the good spares 2 weeks of work planed in July but will need to coordinate with shielding/target installation efforts 5
Plans on the preamp (2 options) 1. Repair the broken N277s (the exact model we used are very hard to find) 2. Replace with more modern electronics (Decision science amplifier/discriminator, needs some re-design to fit the form-factor ) (appreciate help if the collaborator could help find the same N227s or fix them) 6
