1. Overview of LERF Status, Plans and Goals

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

3. LERF Readiness Review 9/30/15
LERF provides a unique resource for accelerator research and applications in Nuclear and Materials research.
On-going activities include:
DarkLIGHT
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

4. LERF Readiness Review 9/30/15
Goals for FY 2016
Verify F100 operation
Verify Dark Light setup operation
Run Dark Light experiment Phases 1a and 1b
Produce proposal for isotope production
Carry out risk reduction experiments for Project E.
LERF Readiness Review 9/30/15

5. LERF Readiness Review 9/30/15
F100 Installed in Vault
LERF Readiness Review 9/30/15

6. DarkLIGHT Experiment - Status
Phase I: funded by NSF MRI: $1M 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): $5-10M
Collaboration seeking future funding
LERF Readiness Review 9/30/15

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

8. LERF Readiness Review 9/30/15
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
F100 is commissioned without beam
92 MV voltage
Average Gradient = 16.4 MV/m
Average Q0= 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

9. LERF Readiness Review 9/30/15
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 M55 system and Happek
Hot Check out
Magnets
Verify trim rack functionality
Check rasters on 1G dump
verify back leg magnets in IR mode
polarity checks on quads, correctors
Hot Check-out of 1.5 kW supplies
LERF Readiness Review 9/30/15

10. LERF Readiness Review 9/30/15
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.
MPS
Replace LeCroy with SSG spare
Make sure the insertable dump functions
Miscellaneous
Develop LERF Element Database (LED) (by April)
Develop procedures and troubleshooting guide (by April)
LERF Readiness Review 9/30/15

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

12. LERF Readiness Review 9/30/15
October run
Hot Check out week of October 12.
Run October with operators.
Run 12 hours/day, 5 days/week.
Run with Dark light energy (100 MeV), charge (60 pC) and longitudinal match (complete energy recovery).
Musts:
Cross train operators
Recirculate CW beam
Shoulds:
Recirculate 5 mA beam for extended period
Run at higher energy
LERF Readiness Review 9/30/15

13. Nov.-Mar. Installation Activities
Must:
Perform Readiness Review (Dec. 7-9)
Pull out IR wiggler and THz chicane
Measure and characterize solenoid
Install all 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

14. LERF Readiness Review 9/30/15
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 mA 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

15. LERF Readiness Review 9/30/15
Spring Installation
Slide solenoid to extracted position.
Install the detectors in the solenoid and wire up.
Install the Phase 1b 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

16. LERF Readiness Review 9/30/15
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

17. LERF Readiness Review 9/30/15
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