Electronics and Detector Installations at BEPCII
Explore the installations and upgrades at BEPCII, including the BLM and ZDD detectors, their provided electronics, and the running status updates over the years. Discover the components, tasks, and improvements made to enhance the performance of the detectors and electronics systems at BEPCII from 2007 to 2021.
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
BLM & ZDD for BEPC2 Xiao CAI 2024.9.14
BLM (BEPCII luminosity monitor,@west side) ZDD (Zero Degree Detector, @east side) Electronics 2
BLM (Provided by USTC, 2009) ?+? ?+? ? PMT Light Guide Tungsten converter ? Fused Silica Fused Silica Light Guide 3
ZDD (provided by INFN-LNF, 2011) ?+? ?? ? lead-scintillating fibers lead-scintillating fibers 4
Angular distributions for emitted photons in Bremsstrahlung (black histogram) and ISR (red histogram) processes 5
LUM/ZDD electronics LUM (west side) Write threshold 10 Fast amplifier PMT signal Discriminator DAQ ~30m cable DAQ input signal: TTL, height >2.5V Fast signal, width 2~3ns Slow control PC Preamplifier box ZDD (east side) Write threshold 10 Fast amplifier ZDD signal Discriminator DAQ ~30m cable Preamplifier box BES3 DAQ Flash ADC ZDD VME crate BES electronics hall (next to BES control room) BES experimental hall PMT signal & ZDD signal: front edge ~2ns, FWHM ~3.2ns, Pulse height ~100mV ZDD 16 PMT signals send to ZDD VME system (flash ADC), as a part of BES3 physics data acquirement. A sum signal for 4 PMTs (block 1/5/9/13) of ZDD send to preamplifier box for BEPC2 beam tunning. Preamplifier box located at BES Electronics Platform first floor.
Electronics in BES control room VME Crate (Provide Time Signal) Lum Crate (Lum DAQ board) DC Power Supply (for Pre-Amplifier) 7
Online relative luminosity and history graph Note: only have some old pictures in laptop, sorry for it! 8
Detector running status 2007, BLMs installation(east & west side) 2011, east side BLM uninstallation, ZDD installation 2011, new DAQ electronics installation (provided by IHEP trigger group) 2015-2017, output signal of preamplifier box decay, a NIM electronics added before DAQ to amplify signal. 2020, ZDD preamplifier box crashed again, ZDD not work for several months. 2021, a company make 4 new preamplifier boxes for us, ZDD running well. 9
