1 / 14

Wolfgang Lohmann, DESY

This document outlines the comprehensive testbeam plans for LEP instrumentation at DESY focused on luminosity, energy, and polarization measurement. Key components include forward calorimeters, radiation-hard sensors, and compact calorimeters operating in the MeV range with rigorous radiation resilience. Testing of assembled sensor planes and energy measurement techniques are described, highlighting significant achievements like successful commissioning runs and plans for future secondary beams. Ongoing studies include beam diagnostics with laserwire technology and background studies to enhance the performance of next-generation collision experiments.

cleave
Télécharger la présentation

Wolfgang Lohmann, 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. Testbeam plans for LEP instrumentation Wolfgang Lohmann, DESY LEP: Luminosity, Energy, Polarisation measurement LCWS Bangalore

  2. Luminosity Measurement: Very forward alorimeters 300 cm VTX Beampipe FTD IP LumiCal BeamCal Challenge: BeamCal • 15000 e+e- per BX, MeV range, total 10 – 20 TeV • 10 MGy per year -Radiation hard sensors -linearity -compact calorimeters

  3. A sensor prototype; 1 cm2 CVD diamond Radiation Hardness April 2006, Late 2006 Exposure to a ~10 MeV electron beam at DANILAC (TU Darmstadt) O(MGy) per week Energy, electron current tunable: 2.5 – 120 MeV, 1 nA – 50 mA Energy few MeV (Microtron) JINR 2006/2007 Linearity Late 2006/2007 CERN PS Energy (mixed beam): few GeV 103 – 106 particles in ~10 ns Repeat and refine previous measurements (better flux calibration)

  4. Compactness Thin instrumented sensor plane prototypes Late 2006/ 2007/2008 DESY Few GeV electrons, EUDET infrastructure Goal: Test of assembled sensor planes, measurement of the performance … Prepare the assembly of a prototype

  5. ESA Testbeam Program

  6. Energy Measurement: BPM energy spectrometer Four magnets BPMs Commissioning run in Jan., very successful; prepared for data taking in march 2006 Goal: Proof of principle of the beam momentum control at 10-4accuracy

  7. Synchrotron stripe energy spectrometer Prototype quartz fiber detector (8 x 100 mm, 8 x 600 mm, with multi-anode PMT is installed in the A-line SLM

  8. ESA Testbeam Program In addition: - Collimator wakefield studies (optimisation of the shape) - Bunch length studies (within LCLS activities) - EMI studies 28.5 GeV e- beam, bunch charge 2x1010, bunch length ~ ILC Data taking Two weeks April 2006 Two weeks July 2006 Two 2-week runs in 2007 (planned) Future plans: - background studies for BPM/kickers (FONT) (generate spray beam using a target- mimic pair background, study influence on instruments with an instrumented mockup of the ILC IR), - EMI

  9. ESA Testbeam Program Future of SLAC testbeams: -primary beam available up to 2008 (end of PEP-II era) later (LCLS era) under discussion; 14 GeV (LCLS), up to 50 GeV but: ESA needs a new PPS system -secondary beams (e,g, pi, p), 1 – 25 GeV, 10 Hz) might be available

  10. Beam Diagnostics with a Laserwire Determination of the transverse profile of bunches with a Laserwire Test set-up at PETRA (DESY)

  11. Beam Diagnostics with a Laserwire 2-dim scans PETRAII 2006/2007 Laser wire calorimeter DESYII ATF 2006 2006-2008 Emittance measurement with laser wire ATF2 planned Upgrade of the PETRA system PETRAIII 2008

  12. ATF Testbeam at KEK ATF 2006

  13. ATF Testbeam at KEK Goal: Ensure controlled collisions of nm beams! ATF 1.3 GeV e- beam size few mm ATF II “ 37nm (2008)

  14. ATF Testbeam at KEK - Extension of these studies to ATF2 – stabilisation of a final doublet system - Continuation of the nano-BPM research

More Related