Overview of LERF Status Plans and Goals Outline

Overview of LERF Status, Plans and Goals

Outline • • Introduction and goals Status of Resuscitation Plans for immediate run (October) Plans for later runs LERF Readiness Review 9/30/15 2

LERF provides a unique resource for accelerator research and applications in Nuclear and Materials research. On-going activities include: • Dark. LIGHT – Beam-time request submitted – Resuscitation activities ongoing – Starting detailed beamline design and halo study • Isotope Production – Have funds for full proposal • Project E (EUVFEL design) – Waiting for DOE approval of CRADA – Potential risk reduction experiments using LERF • Other – Diagnostic studies – Positron production (proposed) – MEIC studies (LDRD) LERF Readiness Review 9/30/15

Goals for FY 2016 • • • Verify F 100 operation Verify Dark Light setup operation Run Dark Light experiment Phases 1 a and 1 b Produce proposal for isotope production Carry out risk reduction experiments for Project E. LERF Readiness Review 9/30/15 4

F 100 Installed in Vault LERF Readiness Review 9/30/15 5

Dark. LIGHT Experiment - Status Phase I: funded by NSF MRI: $1 M approximately Install magnet and detector in place of current IR wiggler Reuse existing solenoid magnet, use prototype GEM trackers and silicon detectors, funds low-pressure target & differential pumping system (under construction using elements of windowless gas target of OLYMPUS experiment) Phase II: (complete experiment): $5 -10 M Collaboration seeking future funding LERF Readiness Review 9/30/15 6

Beam Requirements ü 100 Me. V beam energy (~6 MV/m mean gradient) ü Up to 10 m. A beam current (5 m. A for phase 1) ü Unpolarized beam ü Small energy spread. ü Complete energy recovery ü Repetition rate 75 MHz • In the future, need to switch to optimum repetition rate and different gun technology. LERF Readiness Review 9/30/15 7

Resuscitation Status • • • Gun is ready for operation. DLPC is working with simulated RF. Accelerator is aligned. All vacuum levels are good. Zones 1, 2 and 4 have operated at usable gradients F 100 is commissioned without beam – – 92 MV voltage Average Gradient = 16. 4 MV/m Average Q 0= 1. 6 x 1010 Average FE onset = 12. 7 MV/m (71 MV) • All bulk supplies have been run through hysteresis. • Server upgrade is done. • Working on TStep deck for machine (current and DL). LERF Readiness Review 9/30/15 8

To be Completed • • • Injector – Drive laser aligned – RF to drive laser. – Install and check out magnets and viewer between gun and booster. – Drive laser RFCM upgrade (by April) – DLPC upgrade (mostly done, complete by April) Diagnostics – Get viewers working – Restore M 55 system and Happek – Hot Check out Magnets – Verify trim rack functionality – Check rasters on 1 G dump – verify back leg magnets in IR mode – polarity checks on quads, correctors – Hot Check-out of 1. 5 k. W supplies LERF Readiness Review 9/30/15 9

To be Completed (cont. ) • Vacuum – Complete Vacuum system upgrades – Fast valves hook-up – Hot Check Out • RF and SRF – Check out zone 3 RF and cavity performance when vacuum work is done. – Hot Check Out • MPS – Replace Le. Croy with SSG spare – Make sure the insertable dump functions – Hot Check Out • Miscellaneous – Develop LERF Element Database (LED) (by April) – Develop procedures and troubleshooting guide (by April) LERF Readiness Review 9/30/15 10

Proposed FY 2015 -16 Schedule • June-Sept. 2015 Machine resuscitation without beam (VA Commonwealth funds) • Sept. 30, 2015 Internal readiness review. • Oct. 19 -30, 2015 Resuscitate IR line with wiggler open. • Dec. 7 -9 2015 Dark Light Readiness review (Physics). • Nov. -Mar. 2015 Install Dark Light magnets. Complete drive laser upgrade. • April 2016 Check out transport through magnets. • Summer 2016 Install Dark Light phase 1 b and run with low current beam. Install Dark Light phase 1 a (internal target) and take data with high current beam. LERF Readiness Review 9/30/15 11

October run • • Hot Check out week of October 12. Run October 19 -30 with operators. Run 12 hours/day, 5 days/week. Run with Dark light energy (100 Me. V), charge (60 p. C) and longitudinal match (complete energy recovery). • Musts: – Cross train operators – Recirculate CW beam • Shoulds: – Recirculate 5 m. A beam for extended period – Run at higher energy LERF Readiness Review 9/30/15 12

Nov. -Mar. Installation Activities Must: • Perform Readiness Review (Dec. 7 -9) • Pull out IR wiggler and THz chicane • Measure and characterize solenoid • Install Dark Light magnets • Install beam tube through the solenoid with new valve This will be funded by WFO between MIT and Jlab LERF Readiness Review 9/30/15 13

April run • Run with Dark light configuration and magnetic lattice but no internal target. • Still run 12 hrs/day, 5 days/wk. Two weeks of running. • Musts: – Operators run the machine – CASA owns the lattice using LED – Recirculate 5 m. A CW beam • Shoulds: – Migrate LERF tools to CEBAF equivalents as much as possible – Use final HCO procedures integrated with LED LERF Readiness Review 9/30/15 14

Spring Installation • Slide solenoid to extracted position. • Install the detectors in the solenoid and wire up. • Install the Phase 1 b apparatus in place of the solenoid. Most of this work will be done by MIT personnel. May need a few man-weeks of support from installation techs. LERF Readiness Review 9/30/15 15

Summer run • This should require two separate runs of 6 weeks and 2 weeks each separated by about two weeks of work to change experiments. • Still running 12 hours/day, 5 days/week. • The Operations department will run the accelerator for the Users according to the LOD and the COO. LERF Readiness Review 9/30/15 16

Summary • Resuscitation run will test subsystems in October and complete resuscitation process. • April run and FY 2016 maintenance should incorporate LERF into CEBAF operations. • Summer run should demonstrate LERF as a DOE-NP user facility. • Future applications will require their own Readiness Reviews LERF Readiness Review 9/30/15 17