1 / 12

E906 Changes

E906 Changes. Spectrometer Location Spectrometer’s 2 nd magnet Hodoscopes Scintillator for Station 1 and 2 Photomultiplier tubes DAQ/Trigger. Paul E. Reimer 8 December 2006. Location Fermilab. Original Meson East is now not Available Superconducting Cryo-Module Test Facility (SCMTF).

kreeli
Download Presentation

E906 Changes

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. E906 Changes • Spectrometer Location • Spectrometer’s 2nd magnet • Hodoscopes • Scintillator for Station 1 and 2 • Photomultiplier tubes • DAQ/Trigger Paul E. Reimer 8 December 2006

  2. Location Fermilab Original • Meson East is now not Available • Superconducting Cryo-Module Test Facility (SCMTF) E906 Changes since Inception

  3. NM4 (KTeV) Meson West Location Fermilab (cont) E906 Changes since Inception

  4. Location Fermilab • NM4 (KTeV) • Beam lime below grade allows for a horizontal bending spectrometer—bends + and - into earth. Easier assembly for magnets. • Possibility to use KTeV Magnet • Nicer facility for physicists • Meson West • Vertical bend spectro.—bends + into earth. • 2nd magnet (SM3) must be assembled (but is available) E906 Changes since Inception

  5. Beam Request and Structure • Old Plan was for 1 £ 1012 protons/s and accumulate 5.3 £ 1018 protons on target in 1 year • Unacceptable impact on other Fermilab proton users • New Plan • Cut impact on other proton users by ¼ • 2 £ 1012 protons/s • 5 s long slow extraction spill • Total of 5.3 £ 1018 protons in 2 years (with some allowance for normal Fermilab maintenance shutdowns, etc E906 Changes since Inception

  6. M1 Magnet • New coils • Reuse whole pieces of SM12 magnet yoke (SM12 was the 14.4 m dipole used by E866) E906 Changes since Inception

  7. 2nd Spectrometer Magnet • Originally proposed Jolly Green Giant, 1.65 T-m (500 MeV pT) 80 £ 50 in. • In use by E907/MIPP (although their future is uncertain) • Possibly in need of repairs • Other magnets have become available: • SM3 (BTeV is no longer with us) 3 T-m, (900 MeV pT) 60 £ 60 £ 210 inches • KTeV Magnet (CKM and KAMI are no longer with us) ¼2 T-m, (600 MeV pT ) 2m £ 2m £ 200 inches • Impact on measurements (Monte Carlo from ACU students): • Momentum (and hence M and xF) resolution dominated by multiple scattering and energy loss in absorber until pT kick < 200 MeV • Acceptance also approximately the same for pT kick of 900 to 400 MeV • Plan: • MWest—Fermilab reassembles SM3 • NM4 (KTeV) relocate KTeV magnet to appropriate position E906 Changes since Inception

  8. Scintillator for Hodoscopes: Station 1 and 2 • Original plan was to purchase new material for all stations • Current plan: • Purchase new material for Stations 3Y, 4Xa, 4Xb, 4Y (Abilene) • Recover material for Stations 1X, 1Y, 2X, 2Y from HERMES muon hodoscopes which will have to be refashioned and polished in one dimension. (Naomi Makins, Illinois) • Purchase new light guide material for all stations. E906 Changes since Inception

  9. Photomultiplier Tubes for Double Ended Readout • Original plan was to purchase ¼ 220 new 2” PMT’s to add double ended readout to Station 3 and 4 Hodoscopes, in addition to reusing E866 PMT’s • Current plan: • Recover 250 1.5” PMT’s/bases/shields from ZEUS at DESY (Argonne’s HEP) rather than new purchase (more could be available) • Cockroft Walton PMT bases with power supply • Need to test PMT’s, both ZEUS and old E866 E906 Changes since Inception

  10. DAQ • Old plan was to borrow Fermilab E871 DAQ running Fermilab DART system • Still available to us (I verified this in November) • Do we really want the DAQ running on 10 yr old hardware? • DART is no longer supported at Fermilab; although, there is no operational, Fermilab-supported system appropriate for E906 • Solution: • JLab CODA system • Need to implement Nevis bus readout • Need to implement FERA readout • Either solution will need local (collaboration) expert(s) E906 Changes since Inception

  11. Trigger • Old Plan was to Implement in copies of LeCroy Logic Units • Units no longer available • Expensive to duplicate units • Technology has evolved • New plan (Rutgers, Ron Gilman) • Implement in FPGA • Much cheaper, more flexible logic E906 Changes since Inception

  12. Bottom Line • E906 has changed in terms of implementation • Physics goals have not changed and will be reached with new configuration • Hope to start construction in 2007 and start taking data in summer 2009 E906 Changes since Inception

More Related