1. IP Area Reconfiguration Conceptual Design Five Phases: 1.Transport (A) 2.Gas Chamber 3.Injection Chamber 4.Compressor 5.Transport (B) M. Litos July 24, 2014

2. General Motivations Need more space in key locations for all non- E200 laser experiments, especially diagnostic applications Need more independent control of low intensity beams (relative to high intensity), including attenuation, timing, and compression Need to have appropriate delay between high intensity and low intensity beams Need to be able to couple low intensity beams into experimental gas chamber Need more accommodating working space Need more flexible / modular experimental setup

3. Direct Quote from E224 Requirements: “[They need the] ability to control probe size, delay, energy, and duration, independently of the main ionizing laser pulse. This will require splitting a portion of the main laser beam before the current compressor, the construction of a second compressor, an adjustable delay line, resizing optics, and wave front tilting prism or grating setup. All of this would require additional delay for the main, ionizing pulse. The probe profile would be more uniform than in the clipping approach used now, and the axicon focus would not be disturbed.”

4. PHASE 1: Transport (A) B4 B5, B6 Comp- ressor IP Box long oven breadboard laser work space small-comp 1 small-comp 2 Vacuum ends after B4 Sampler after lens; periscope down to table Removable thin-shell pipe from B4 to B5 Sampler before B5; periscope down to table Remove old EOS chamber and Wire Make all motor feeds on IP Box come out on upstream side Lots of breadboards Open-air compressors lens, sampler 1 sampler 2 PHASE 1: Transport (A)

5. CURRENT CONFIGURATION PHASE 1: Transport (A) B4 lens B5, B6 Comp- ressor IP Box long oven B4 B5, B6 Comp- ressor IP Box long oven breadboard laser work space small-comp 1 small-comp 2 Vacuum ends after B4 Sampler after lens; periscope down to table Removable thin-shell pipe from B4 to B5 Sampler before B5; periscope down to table Remove old EOS chamber and Wire Make all motor feeds on IP Box come out on upstream side Lots of breadboards Open-air compressors lens, sampler 1 sampler 2

6. PHASE 1: Transport (A) Vacuum ends after B4 Sampler after lens; periscope down to table Removable thin-shell pipe from B4 to B5 Sampler before B5; periscope down to table Remove old EOS chamber and Wire Make all motor feeds on IP Box come out on upstream side Lots of breadboards Open-air compressors B4 B5, B6 Comp- ressor IP Box long oven lens, sampler 1 sampler 2 breadboard laser work space Breadboards may not be feasible on wall side Turbo for transport would be repurposed for compressor Getting turbo off of B6 opens up critical space for sampler periscope 2 Can simply use irises to reduce low intensity beam sizes, or telescopes Periscopes will require proper design effort Diagnostic lasers should enter IP Box from side ports; no more picking off main beam small-comp 1 small-comp 2 Open air compressor(s) give independent compression for low intensity beams Diagnostic beams can arrive at IP simultaneously with high intensity beam Controllable delay between high intensity beam and diagnostic beams Directly benefits EOS, plasma imaging, Trojan Horse, THz probe(?) Indirectly benefits e - and e + PWFA, hollow channel

7. PHASE 1: Transport (A) Vacuum ends after B4 Sampler after lens; periscope down to table Removable thin-shell pipe from B4 to B5 Sampler before B5; periscope down to table Remove old EOS chamber and Wire Make all motor feeds on IP Box come out on upstream side Lots of breadboards Open-air compressors B4 B5, B6 Comp- ressor IP Box long oven lens, sampler 1 sampler 2 breadboard laser work space Cost: Design: ~$10k Fab/parts: ~$20k Installation: ~$5k Total: ~$35k small-comp 1 small-comp 2 Time Scale: Design: ~1 month Fab/parts: ~1 months Installation: ~2 week Total: ~ 2.5 months Most important and useful Phase Solves the most problems at once Relatively cheap and fast If prioritized, should be doable before next run begins Best return on investment

8. gas chamber PHASE 2: Gas Chamber B4 B5, B6 Comp- ressor IP Box breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2 Add gas chamber in place of oven Mate with the 10” bellows Made of several smaller modules PHASE 2: Gas Chamber

9. gas chamber CURRENT CONFIGURATION PHASE 2: Gas Chamber B4 lens B5, B6 Comp- ressor IP Box long oven B4 B5, B6 Comp- ressor IP Box breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2 Add gas chamber in place of oven Mate with the 10” bellows Made of several smaller modules

10. gas chamber PHASE 2: Gas Chamber B4 B5, B6 Comp- ressor IP Box breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2 Add gas chamber in place of oven Mate with the 10” bellows Made of several smaller modules Can couple low intensity laser in from small compressor 1 area Probably need long delay stage before small compressor 1; no problem Directly benefits plasma imaging, Trojan Horse Indirectly benefits e - and e + PWFA, hollow channel

11. gas chamber PHASE 2: Gas Chamber B4 B5, B6 Comp- ressor IP Box breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2 Add gas chamber in place of oven Mate with the 10” bellows Made of several smaller modules Cost: Design: ~$k Fab/parts: ~$k Installation: ~$k Total: ~$k Time Scale: Design: ~ month Fab/parts: ~ months Installation: ~ week Total: ~ months Second most important and useful Phase Accommodates many experiments at once Simple design (“string of cubes”) could be implemented before next run

12. gas chamber PHASE 3: Injection Chamber Replace IP Box with Injection chamber > 2x as long as IP Box ~1.5 x as wide as IP Box Contains 2 swappable breadboards Many viewports Motor feeds on upstream end Compatible with current and future compressor location Room for gas cell, etc. Two (clear?) lids B4 B5, B6 Comp- ressor breadboard laser work space Injection Chamber small-comp 1 small-comp 2 lens, sampler 1 sampler 2 PHASE 3: Injection Chamber

13. gas chamber CURRENT CONFIGURATION PHASE 3: Injection Chamber Replace IP Box with Injection chamber > 2x as long as IP Box ~1.5 x as wide as IP Box Contains 2 swappable breadboards Many viewports Motor feeds on upstream end Compatible with current and future compressor location Room for gas cell, etc. Two (clear?) lids B4 B5, B6 Comp- ressor breadboard laser work space Injection Chamber small-comp 1 small-comp 2 lens, sampler 1 sampler 2

14. gas chamber PHASE 3: Injection Chamber Replace IP Box with Injection chamber > 2x as long as IP Box ~1.5 x as wide as IP Box Contains 2 swappable breadboards Many viewports Motor feeds on upstream end Compatible with current and future compressor location Room for gas cell, etc. Two (clear?) lids B4 B5, B6 Comp- ressor breadboard laser work space Injection Chamber small-comp 1 small-comp 2 Injection Chamber is large enough for redirection of high intensity beam Enough length to allow for coupling optic (e.g. gold mirror), EO crystal / OTR foil, and gas cell Mounting points for two independent breadboards (can use just one if preferred) “Plug and play” motor connector feedthroughs and vacuum cables for easy swapping EO crystal / OTR foil actuator mounted from below on breadboard(?) Many large flanges, e.g. 3 x 10” flange per side Can put flanges within flanges if smaller ones are required Creates room for gas cell independent of long gas chamber (can be used in conjunction with oven) Directly benefits EOS, plasma imaging Indirectly benefits e - and e + PWFA, hollow channel Radiabeam will make Injection Chamber Benefit to other injection schemes? lens, sampler 1 sampler 2

15. gas chamber PHASE 3: Injection Chamber Replace IP Box with Injection chamber > 2x as long as IP Box ~1.5 x as wide as IP Box Contains 2 swappable breadboards Many viewports Motor feeds on upstream end Compatible with current and future compressor location Room for gas cell, etc. Two (clear?) lids B4 B5, B6 Comp- ressor breadboard laser work space Injection Chamber small-comp 1 small-comp 2 lens, sampler 1 sampler 2 Cost: Design: ~$20k Fab/parts: ~$30k Installation: ~$10k Total: ~$60k Time Scale: Design: ~ 1 month Fab/parts: ~ 1 months Installation: ~ 1 week Total: ~ 2.25 months Very useful for future oven experiments Enables more sophisticated gas experiments Somewhat costly, but unclear who pays (?) Probably doable before next run begins

16. gas chamber PHASE 4: Compressor Move Compressor upstream by ~1.5m Extend removable thin- shell pipe to cover distance from B6 to new Compressor location Probably requires relocation of LSS2 control panel Add many viewports to compressor Add flange compatible with PHASE 4 Large coupling to I.C. B4 B5, B6 Comp- ressor Injection Chamber breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2 PHASE 4: Compressor

17. gas chamber CURRENT CONFIGURATION PHASE 4: Compressor Move Compressor upstream by ~1.5m Extend removable thin- shell pipe to cover distance from B6 to new Compressor location Probably requires relocation of LSS2 control panel Add many viewports to compressor Add flange compatible with PHASE 4 Large coupling to I.C. B4 B5, B6 Comp- ressor Injection Chamber breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2

18. gas chamber PHASE 4: Compressor Move Compressor upstream by ~1.5m Extend removable thin- shell pipe to cover distance from B6 to new Compressor location Probably requires relocation of LSS2 control panel Add many viewports to compressor Add flange compatible with PHASE 4 Large coupling to I.C. B4 B5, B6 Comp- ressor Injection Chamber breadboard laser work space small-comp 1 small-comp 2 Provides larger contiguous working space for low intensity laser beams Easier for diagnostic beams to arrive at IP simultaneously with high intensity beam More room for diagnostics (e.g. cameras) next to Injection Chamber More room for multiple beams to enter Injection Chamber from Compressor Upgrade Injection Chamber coupling to valve with thick and thin window? Can monitor alignment references within compressor (e.g. zero-order angle) If modifying compressor to add viewports, moving it is not so much added work (gratings must be removed then reinstalled anyway) Directly benefits e - and e + PWFA, hollow channel, Trojan Horse(?) Indirectly benefits EOS, plasma imaging lens, sampler 1 sampler 2

19. gas chamber PHASE 4: Compressor Move Compressor upstream by ~1.5m Extend removable thin- shell pipe to cover distance from B6 to new Compressor location Probably requires relocation of LSS2 control panel Add many viewports to compressor Add flange compatible with PHASE 4 Large coupling to I.C. B4 B5, B6 Comp- ressor Injection Chamber breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2 Cost: Design: ~$10k Fab/parts: ~$20k Installation: ~$10k Total: ~$40k Time Scale: Design: ~ 1 month Fab/parts: ~ 1 month Installation: ~ 1 week Total: ~ 2.25 months Creates extremely useful contiguous laser work space Creates extremely useful added delay to high power laser beam path If modifying compressor box anyway (new viewports), might as well move it, too

20. gas chamber PHASE 5: Transport (B) B5 now periscopes UP to B6 Removable thin-shell pipe at ceiling height goes over compressor to B7 B7 periscopes down to B8 Laser enters compressor from upstream side B4 B5, B6 Comp- ressor Injection Chamber B7, B8 breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2 PHASE 5: Transport (B)

21. gas chamber CURRENT CONFIGURATION PHASE 5: Transport (B) B5 now periscopes UP to B6 Removable thin-shell pipe at ceiling height goes over compressor to B7 B7 periscopes down to B8 Laser enters compressor from upstream side B4 B5, B6 Comp- ressor Injection Chamber B7, B8 breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2

22. gas chamber PHASE 5: Transport (B) B5 now periscopes UP to B6 Removable thin-shell pipe at ceiling height goes over compressor to B7 B7 periscopes down to B8 Laser enters compressor from upstream side B4 B5, B6 Comp- ressor Injection Chamber B7, B8 breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2 Gets transport out of the way, creating more working space for people Increases delay of high intensity pulse— may or may not be beneficial Can remove transport tube to open compressor lid, if necessary Directly benefits humans working in IP area

23. gas chamber PHASE 5: Transport (B) B5 now periscopes UP to B6 Removable thin-shell pipe at ceiling height goes over compressor to B7 B7 periscopes down to B8 Laser enters compressor from upstream side B4 B5, B6 Comp- ressor Injection Chamber B7, B8 breadboard laser work space small-comp 1 small-comp 2 lens, sampler 1 sampler 2 Cost: Design: ~$10k Fab/parts: ~$20k Installation: ~$5k Total: ~$35k Time Scale: Design: ~ 1 month Fab/parts: ~ 1 months Installation: ~ 1 week Total: ~ 2.25 months Mostly motivated by spatial constraints of tunnel—creates more space for people Adds yet more delay to high power laser [too much??] Probably useful, but least important Phase; may want to defer until later

24. Additional Useful Upgrades Fast and easy remote transport alignment Keep transport aligned during experimental shifts and PAMMs Allow non-SLAC laser users to easily align transport without help High power in tunnel during access Only prevented by RP Needed for precise alignment of low intensity beams Two modes: high power w/o axicon low power w/ axicon Remote aperture control for high power (or low power) beam For alignment For experiment EOS as laser/e-beam timing feedback e-beam phase cavity diagnostic

25. Additional Considerations THz probe beam setup PHASE 1 should accommodate nicely Witness beam photo-injector Other experiments??

26. Phase 1: Transport (A) critical, high value, can be done before next run Phase 2: Gas Chamber critical, high value, can be done by Jan. Phase 3: Injection Chamber very useful for oven, useful for gas, can be done before next run Phase 4: Compressor very useful, can be done before next run, but contingent upon Injection Chamber Phase 5: Transport (B) probably useful, can be done by Jan., but contingent upon Compressor Synopsis