1 / 23

Digital Electronic Tests at JYFL

Digital Electronic Tests at JYFL. Introduction Synchronisation Tests / TDR Integration Phase I Detector Tests Clover Tests. Pete Jones, University of Jyväskylä SAGE / LISA Kick-Off Meeting Daresbury Laboratory, 2nd September 2005. TNT2. TNT2. Synchronisation.

kiora
Download Presentation

Digital Electronic Tests at JYFL

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. Digital Electronic Tests at JYFL • Introduction • Synchronisation Tests / TDR Integration • Phase I Detector Tests • Clover Tests Pete Jones, University of JyväskyläSAGE / LISA Kick-Off MeetingDaresbury Laboratory, 2nd September 2005

  2. TNT2

  3. TNT2

  4. Synchronisation • TNT uses 100MHz clock, but currently cannot be used as a ”slave” • Use sync pulses from TDR metronome • Use pseudo-random pulse generator into both TDR and TNT • Merge / Time differences offline

  5. Syncronisation Results • Pseudo-random generator shows 0.6x10-6 cannot be corellated • TNT ”dead-time” ~1.8% (10kHz input) : < 4us pulses • Dead time possible in both systems

  6. In Beam Tests • Idea : Test both analogue and digital electronics in real situation • Test effects of counting rates • Performance more realistic than with sources (multiplicity) • Idea of what kind of gamma-ray array need would be for the future

  7. Test Reaction • 107,109Ag(36Ar,2p2n)139Eu • 160MeV β~2.5% • Ib=5 – 50 pnA • Ge count rate 10-100kHz • RITU Gas counter 1-10kHz

  8. BGO 1 BGO 2 Phase 1 Tests Ge 1 Ge 2 SYNC/RESYNC

  9. Threshold of Digital vs Analogue ..but... Higher Background (veto) Lower threshold

  10. Analogue : Effect of Rate(pileup) 100kHz 50kHz 10kHz

  11. Phase 1 : Analogue

  12. Phase 1 : Analogue

  13. Phase 1 : Digital

  14. Phase 1 : Digital

  15. Phase 1 Tests : Summary • Analogue limited by pileup & resolution • Digital offers lower energy thresholds • Veto handling in digital needs some work, as does marking of data • Digital solution improves counting rate up to 40-50kHz

  16. Clover Tests Angle 1 : 69.2o EUROGAM II = 75.5o Angle 2 : 117.5o EUROGAM II = 104.5o Target – detector distance same as in EUROGAM II Detector Resolution ~2.5 keV

  17. Angle 1 : 69.2o Clover Ge44 Clover Ge44

  18. Angle 2 : 117.5o Clover Ge23 Clover Ge23

  19. Suppression, Sum & Fold n=2 n=1 Unsup press ”clean”

  20. Diagonal Crystals • 1 • 3 2 E1+3 E3 E1 ”clean”

  21. γ-γ coincidence matrix sum g713 g554 g323 Clover Ph 1

  22. Digital Data… 70kHz 50kHz 40kHz 20kHz 10kHz

  23. Summary • Instrument Digital Electonics into TDR : Need some ”TDR” compatability • Digital electronics : • seems work well with phase 1, and improves counting capability • Offer lower thresholds • Need some work on veto / data • Clover detector gives as good performance as phase 1 • More efficient • Digital problems need to be solved

More Related