1 / 14

JLC Collimation System Design

JLC Collimation System Design. T.Ohgaki (KEK) JLC FFIR/BDSIM Collaboration. 1. JLC Collimation System 2. Synchrotron Radiation, Electron Loss 3. Muon Attenuators 4. Summary. JLC Collimation and Final Focus. Based on NLC Collimation system + Pantaleo’FF

sheena
Download Presentation

JLC Collimation System Design

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. JLC Collimation System Design T.Ohgaki (KEK) JLC FFIR/BDSIM Collaboration 1. JLC Collimation System 2. Synchrotron Radiation, Electron Loss 3. Muon Attenuators 4. Summary T.Ohgaki, ISG9, Dec 10-13, 2002

  2. JLC Collimation and Final Focus Based on NLC Collimation system +Pantaleo’FF Full crossing angle 6mrad for changing the angle of energy collimation T.Ohgaki, ISG9, Dec 10-13, 2002

  3. JLC Beam Parameters Center of mass energy 500 GeV Number of particle per bunch 0.75x1010 Number of bunches per train 192 Repetition frequency 120 Hz Horizontal normalized emittance 3.6x10-6 m rad Vertical normalized emittance 4.0x10-8 m rad Horizontal beta function in IP 8x10-3 m Vertical beta function in IP 1.1x10-4 m Horizontal beam size in IP 243 nm Vertical beam size in IP 3 nm Horizontal angle in IP 30 mrad Vertical angle in IP 27 mrad T.Ohgaki, ISG9, Dec 10-13, 2002

  4. Collimation Depth & Energy Collimation Collimation Depth Criteria: No photon hit R > 1cm at z = 350cm x’< 13 x 30.3 mrad y’< 43 x 27.3 mrad (13sx, 43sy) Energy Collimation Momentum acceptance |Dp/p| < 0.015 T.Ohgaki, ISG9, Dec 10-13, 2002

  5. Synchrotron Radiation IP front of QD y (m) y (m) x (m) x (m) s=0 s=-3.51 Core, Dp/p 0.3%, macro 10000 (T-ratio: 1) total number of photons 342752 (9.096 MeV) (Collimation+FF) number of photons at IP 10890 (loss 331862) T.Ohgaki, ISG9, Dec 10-13, 2002

  6. Synchrotron Radiation front of QD IP y (m) y (m) x (m) x (m) s=0 s=-3.51 Flat, 13sx 43sy, Dp/p 3%, macro 10000 (T-ratio: 0.3346) total number of photons 217488 (19.39 MeV) (Collimation+FF) number of photons at IP 12208 (loss 205280) T.Ohgaki, ISG9, Dec 10-13, 2002

  7. Synchrotron Radiation QD Magnet QD Magnet y (m) y (m) x (m) x (m) Core, Dp/p 0.3% s=-3.51 Flat, 13sx 43sy, Dp/p 3% s=-3.51 T.Ohgaki, ISG9, Dec 10-13, 2002

  8. Muon backgrounds MUCARLO (Namito version) 4 Muon attenuators 37mx2,45m,70m (option 15m,20m) Electron beam: 250GeV Muon generation point: Spoiler,Absorber Drift space IP 20m 25m 37m 37m 48m 77m T.Ohgaki, ISG9, Dec 10-13, 2002

  9. JLC Muon Attenuator T.Ohgaki, ISG9, Dec 10-13, 2002

  10. Magnetic field of muon attenuators T.Ohgaki, ISG9, Dec 10-13, 2002

  11. Radius and sands of muon attenuators T.Ohgaki, ISG9, Dec 10-13, 2002

  12. Short muon attenuators T.Ohgaki, ISG9, Dec 10-13, 2002

  13. JLC Collimation + Final Focus JLC Collimation + FF Kuroda’s Collimation + FF Crossing 3mrad Crossing 3mrad Big Bend 5.5mrad Gy (m) Gy (m) Muon attenuator Gx (m) Gx (m) Beam Line: 2099m Beam Line: 1434m T.Ohgaki, ISG9, Dec 10-13, 2002

  14. Summary • Based on NLC collimation system +Pantaleo’FF, we have studied JLC collimation system by SAD code. • We have estimated the performance of muon attenuators in this collimation system by MUCARLO. • Plan to make new collimation and final focus for JLC T.Ohgaki, ISG9, Dec 10-13, 2002

More Related