1 / 10

Analogue HCAL R & D studies at DESY

Topics: Slow Control Monitoring System APD studies LED Monitoring for P hysics P roto T ype T ile F iber S ystem studies. Analogue HCAL R & D studies at DESY. H. Meyer. Tile HCAL main meeting 30.01.2004 page 0. Slow Control Monitoring System.

brielle-schmidt
Download Presentation

Analogue HCAL R & D studies at DESY

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Topics: Slow Control Monitoring System APD studies LED Monitoring for PhysicsProtoType Tile Fiber System studies Analogue HCALR & D studiesat DESY H. Meyer Tile HCAL main meeting 30.01.2004 page 0

  2. Slow Control Monitoring System Aim of monitoring: correction of temperature and HV fluctuation =>crucial for APD operation Monitored values: Monitoring speed: • HV (PM, SiPM, APD) • temperatures • with termo resistors on cassettes • low voltage (LED, PIN) • 1 read out per minute • 1ms integration time Tile HCAL main meeting 30.01.2004 page 1

  3. HV Monitoring 4.5 days s = 1 ‰ SiPM s= 0.5 ‰ The power supplies are stable at better than1 ‰ Tile HCAL main meeting 30.01.2004 page 2

  4. Temperatures SiPM 4.5 days temperature sensors not absolutely calibrated fluctuations within 4.5 days: same shape SiPM LED Precision better than 0.05 K daily temperature fluctuations can be corrected => important for APDs PM LED Tile HCAL main meeting 30.01.2004 page 3

  5. Detector stability PM LED signal used to monitor detector stability: The PM is stable within 3% 4 days Time in min SiPM The SiPM is stable within 2% Time in min Tile HCAL main meeting 30.01.2004 page 4

  6. APD temperature effect studies Temperature The Setup: PMT PIN diode LED APD PIN-diode Fibers The PIN diode monitors LED shifts or fluctuations The PMT is for crosscheck The APD signal is studied 4% drop The setup was heated up 20 ºC PM PM signal PIN corrected PM is stable within 2% PM should have no temp. effect Tile HCAL main meeting 30.01.2004 page 5

  7. APD signal correction Temperature APD signal was corrected for LED light drop Different raise shapes: the temperature in the setup was not homogeneous 50 % drop APD temperature dependencies can be corrected Tile HCAL main meeting 30.01.2004 page 6

  8. Multi Tile LED Monitoring Development of NEW concept of LED monitoring for many tiles with a single clear transport fiber for ppt Tiles First results with one tile 5x5 cm2: LED Clear Fiber Using: • single clad 0.5 mm fiber 90 cm long • blue LED Light will be seen only by WLS With higher LED intensity, this system can be used to monitor 1 row of ppt Tile HCAL main meeting 30.01.2004 page 7

  9. TileFibreSystem • g source on Tile • PM read out • average of 4 measurements 3 x 3 cm2 tiles: 4 fiber configurations tested Setup: LY in AU 2 tiles curved diag. 2 tiles center hole 2 tiles center groove Center hole enlarged With optical greace higher light yield Similar light yield obtained for curved diag. and center hole Tile HCAL main meeting 30.01.2004 page 8

  10. Summary • Operational and reliable Slow Control System HV stability within 1‰ Temperature fluctuations monitored with 0.05 K precision • LED monitoring System MiniCal: LED stability of PM and SiPM within 3% will be improoved soon possibility to correct detector temperature dependence ppt: new concept developed to monitor 1 row of tiles promissing results • TFS Studies first tests on 3x3 cm2 tile curved diag. and center hole deliver same light yield Tile HCAL main meeting 30.01.2004 page 9

More Related