SLAC Electron Beam Test Facilities 5 MeV to 23 GeV

1. SLAC Electron Beam Test Facilities5 MeV to 23 GeV • FACET ● ESTB ●NLCTA ● ASTA Carsten Hast, Head Test Facilities SAREC Meeting at SLAC, July 2013

2. 20-23 GeV 5 MeV 2-16 GeV & single e- FACET ASTA NLCTA ESTB 60-220 MeV

3. Overview • ASTA-NLCTA-ESTB-FACET span a broad spectrum of electron energyfrom a few MeV to 23 GeV • Together they allow a broad spectrum of research opportunities • User, technical and scientific support is via the FACET and Test Facilities Division which allows a one stop shopping for User needs • Formal proposal review processes are in place for FACET and ESTB, for the others we are developing them • SLAC’s goal is to operate all beam lines as user facilities

4. FACET Facility for Advanced Accelerator Experimental Tests • DoE HEP National User Facility Linac: Sector 10 Sector 20 Sector 0 ASTA FACET (Sector 20): Notch Collimator xTCAV Experimental Area (next slide)

5. FACET’s Experimental Area Profile measurement experiment Sample chamber Sample chamber Plasma Experiment

6. New 10 TW FACET Ionization Laser

7. FACET Summary • FACET just finished a very successful User run • New features are working and more are coming • Notch collimator to generate two bunches • New 10TW Laser to pre-ionize plasma is working • Laser can be used for other experiments as well • We started to resurrect the whole complex of positron generation, and will be commissioning it during FY2014 • Designs for a THz transport line are in place to take THz up to the laser room • Next FACET run starts fall 2013 • During FACET down times and when the laser is not needed we are sharing it with our SLAC colleagues who are studying materials under extreme conditions

8. ESTB End Station (A) Test Beam ASTA

9. ESTB Mission and Layout • ESTB is a unique Test Beam resource • World’s only high-energy primary electron beam for large scale Linear Collider MDI and beam instrumentation studies • Exceptionally clean and well-defined primary and secondary electron beams for detector development • Will serve a broad User community Pulsed magnets in beam switch yard to send LCLS beam to ESA

10. LCLS and ESTB Beams • LCLS beam • Energy: 2.2 –16.0 GeV • Repetition rate: 120Hz • Beam charge: 20 to 250 pC (150pC typically) • Beam availability > 95%! • ESTB beam • Kick the LCLS beam into ESA @ 5 Hz • Potential for higher rates when LCLS doesn’t need full rate • Primary beam 2.2 -16.0 GeV • Determined by LCLS • <1.5 x 109 e-/pulse (250 pC) • Clean secondary electrons • 2 GeV to 15 GeV, 1 e-/pulse to 109 e-/pulse

11. Experimental Areas in End Station A Beam Beam Dump

12. HERA-B e-Cal modules beam test for GEp(5) at J- Lab (T-508) • Principal Investigator: Ed Brash • Institution: Christopher Newport University / J-Lab (5 Users) • Physics goal: Measure the ratio of the proton elastic form factors GEp/GMp • Calibration of 9 “Shashlik” style lead/scintillating fiber calorimeter modules from Hera-B • Beam parameters • Single electrons @ 5 Hz • Energy: 3, 9, 12 GeV • Various incident angles • Run Times: 6/6 until 6/11 3GeV Beam 2 3 4 5 6 = # of e- / bunch 1

13. ESTB Run Time • Finishing the 1st ESTB User Run next week • 6 weeks of operation between June and now • ESTB schedule is tied to the LCLS operation schedule • ESTB startup mid October • Winter break December 21 to January 15 • Operation until early August 2014 • October 2014 to March 2015 (excluding winter break) • October 2015 beam on again

14. NLCTA Next Linear Collider Test Accelerator ASTA

15. Laser L-Band TTF Couplers Marx Modulator Plasma Switches E-163 DLA RF Testing Echo-7 XTA S-Band Gun X-Band NLCTA End Station B and NLCTA • Direct Laser Acceleration • Echo Seeding • High Gradient Development • ILC Modulator Development • ILC Klystron Cluster Concept • X-Band gun and linac development Klystron Cluster Concept Control Room

16. NLCTA Overview

17. NLCTA • 45m long bunker for e-beams and RF processing • 4 X-band RF stations capable of > 100 MW each • Beam energy 60 - 120 MeV (going to 220 MeV in 2014) • Bunch charge 10 pC - 1 nC • Bunch length 0.5 psec • xy-emittance 1 to few microns • Momentum resolution dp/p ≤ 10-4 • X-Band transverse cavities for bunch length measurements • LCLS 1st generation style S-band injector • Multiple laser systems for E-163, Echo, and XTA • GW-class Ti:Sapphire system (800nm, 2.5 mJ, 1ps) • BBO/BBO tripler for photocathode (266nm, 0.25 mJ) • 100 MW-class OPA (1200-3000 nm, 80-20 mJ) • 5 MW-class DFG-OPA (3000-10,000 nm, 1-3 mJ) • 100 GW-class Ti:Sapphire system (800nm, 4 mJ, 30fs) • Active and passive stabilization techniques • Rich beam diagnostics and experimental infrastructure

19. XTA X-Band Test AcceleratorCompact (~6 meters) Injector Beam Line

20. XTA Beam Line Laser Injection chamber +YAG +FC Gun + Solenoid Linac Laser Compressor(IR) Tripler

21. ASTA Accelerator Structure Test Area ASTA

22. ASTA • Small bunker (10’ by 28’) • Maximal beam energy 50 MeV • 2 X-Band RF Stations • 50 MW each • Variable length pulse compressor that can produce up to 500 MW • 1 S-Band RF station • New laser • Very flexible infrastructure allows combination of the X- and S-Band sources • Quick turn around for experimental changes

24. ASTA Schedule

25. SLAC Electron Beam Test Facilities Summary All supported by SLAC’s FACET and Test Facilities Division https://portal.slac.stanford.edu/sites/ard_public/tfd/Pages/Default.aspx http://facet.slac.stanford.edu and http://estb.slac.stanford.edu Google: SLAC FACET or SLAC ESTB