ESR

Attendance

Creel, Wright, Schleeper, Hasan, Oren, Gomez, Meekins, Kashy, Brindza

Kepple

Agenda and Notes

1. ESR Capacity

ESR is a variable capacity machine producing 4.5K and 15K temperatures and some liquefaction capability.

The two endpoints of capacity are approximately (1,500W at 4.5K and 0W 15K) or (800W at 4.5K and 1,200W at 15K).

Each 1 g/s of lead flow (liquefaction) costs 100W at 4.5K of refrigeration and increases LN2 usage by 3 g/s (~3 gallons/hour).

The addition of the CHL-ESR transferline adds up to 20 g/s at 4.5K with increased electrical power and LN2 costs at CHL.

2. ESR Reliability

Operating ESR at higher capacities will effect availability.

3. FY17 12GeV Needs

Hall C

Q2 cooldown November 16'

Dipole cooldown in February 17'

Q3 cooldown December 16 - January 17

Hall B

Torus stays online for testing. Once testing is complete torus will warm to 80K until solenoid is ready.

Solenoid cooldown May-July 17'

4. Hall Non-12GeV Needs

Hall A Left and right arm magnets are cold.

Target 15K cooldown in October 16'

Hall C Possible target cooldown November-December 16'for testing. Target cooldown and operation in Feb 17'

5. Cryo Needs

Cryo needs to know the prioritized order of how the loads are to be brought back online following problems at the ESR.

The Hall's need to warm up (or not cool) any loads not required for the Physics program. This will reduce the strain on ESR, it will increase availability, it will increase the capacity available to recover loads after any ESR problems, and it will reduce power and LN2 costs.

Cryo is working on ERS maintenance plans for summer 17' The plant has been running for approximately 2.5 years since the last shutdown. Also keep in mind that we will be operating one CHL during the summer 17' so xferline flow might be impacted.

Javier indicated that the loads are here to stay and we need to figure out how to operate the ESR to support them. We indicated that having ESR fully loaded will effect the time it takes to get everyone back online following outages.

Action Items

Attendees will notify cryo of any changes to the plan or changes to the operating conditions including any new tests.

Schleeper will get the latest load estimates new Hall magnets.

Brendza will send Creel the latest Hall C installation schedule.

Schleeper will give Kashy the change in load on the ESR following cooldown of torus

Gomez will investigate sending out weekly priority emails for order of cooldowns

Halls will provide on call contact lists

Future meetings will be held as required.