JLab Cryogenic Plant Capacities

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1 JLab Cryogenic Plant Capacities March 26, 2010 Rao Ganni Thomas Jefferson National Accelerator Facility

2 Cryogenic Plant Locations & Interconnecting Transfer Lines Thomas Jefferson National Accelerator Facility Page 2

3 FEL, 2K JLab Transfer Lines 2K Linacs CHL + SBR, 2K/4K CHL TL To Be Removed ESR, 4K CTF, 4K A B C Thomas Jefferson National Accelerator Facility Page 3

4 Typical Transfer Lines 4K, Warm Helium & LN2 Transfer Lines CHL to ESR Thomas Jefferson National Accelerator Facility Page 4

5 Transfer Line Capacities and Heat Load 4K, 30 grams/sec max flow capacity, 5 grams/sec to keep transfer line cold (heat leak) CHL to ESR ESR to CTF (Being removed for TEDF building) 3K/2K, 35 grams/sec max flow capacity, 10 grams/sec of which to keep transfer line cold (heat leak) CHL to FEL 4K, 10 grams/sec TL design flow capacity for ESR to each of Halls A,B,C; Hall A is using 40 g/s (~60% of Refrigerator Capacity) ESR to Each Hall Thomas Jefferson National Accelerator Facility Page 5

6 JLab Cryogenic Plant Capacities Thomas Jefferson National Accelerator Facility

7 CHL Max Capacity Current 6 GeV (CHL #1) Load: K, K Capacity: K 10 g/s 4.5K New 12 GeV (CHL #1 + new CHL#2) Load: K, K Capacity: K, 24 35K 10 g/s (CHL#1) plus 15 g/s (CHL#2) of liquefaction Thomas Jefferson National Accelerator Facility Page 7

8 11126 GeV CEBAF Upgrade magnets and power supplies CHL-2 Two GV linacs Enhanced capabilities in existing Halls Lower pass beam energies still available Thomas Jefferson National Accelerator Facility Page 9

9 NEW LINAC TL CONFIGURATION CURRENT 6GeV: CHL-1 Supplies Injector, N. and S. Linacs, FEL, and 10 g/s to ESR NEW 12 GeV: CHL-1: Injector, North Linac and ESR (10 g/s) CHL-2: South Linac and existing FEL NOTE: IN CASE OF A CHL-1 OR CHL-2 FAILURE, THE LINAC CAN BE RECONNECTED TOGETHER INTO SINGLE REMAINING CRYO PLANT FOR 6 GeV BEAM OPERATION Thomas Jefferson National Accelerator Facility Page 10

10 Requirement: LINAC TRANSFER LINES NEW FOR 12 GeV NEW 12 GeV on SL Thomas Jefferson National Accelerator Facility Page 11

11 Loads/Capacities: 6GeV/12GeV Breakdown (Accelerator Only) Unit Loads 6 GeV North Linac 12 GeV South Linac 2 K 50 K # 2 K 35 K # 2 K 50 K # 2 K 35 K Loads (#,W) Static Transfer Line Original CM s GeV CM s Dynamic Original CM s GeV CM TL BAYONETS Totals TL SECTION Capacities (W) CHL#1 (W) % of Full Load 92% 97% 87% 66% CHL#2(W) % of Full Load 81% 56% Adding Existing 2K for FEL on South Linac, ~95% for CHL#2 Thomas Jefferson National Accelerator Facility Page 12

12 ESR CRYOGENIC CAPACITY Serves Experimental Halls A,B,C Built in 1977 PROVIDES HELIUM REFRIGERATION OR 11 GRAMS/SEC 4K LIQUEFACTION (CAN RECEIVE ADDITIONAL 10 G/SEC LIQUEFACTION FROM CHL VIA TL) Thomas Jefferson National Accelerator Facility Page 13

13 CTF CRYOGENIC CAPACITY Built in K Shield Refrigerator and 2K Liquefier 35K Shield Refrigerator 5 grams/sec 2K Liquefier (Average) User Max Draw, 15 g/s from Storage Dewar For Peak Refrigeration Loads Thomas Jefferson National Accelerator Facility Page 14

14 HALL D CRYOGENIC CAPACITY Built 1980 Hall D 4.5K Refrigerator 4K Refrigeration or 2 g/s Liquefaction Capacity Hall Mixed Load 0.7 g/s liquefaction + 100W Refrigeration (includes transfer line load) Thomas Jefferson National Accelerator Facility Page 15

15 ESR#2 REFRIGERATOR CAPACITY (Unfunded BIA, Not Installed) Proposed Refrigerator to Boost 6 GeV Program Fabricated in K Refrigeration Or 5 20K Refrigeration (modified cold box) Thomas Jefferson National Accelerator Facility Page 16

16 STANDBY REFRIGERATOR (SBR) CAPACITY Replaces CHL during CHL Major Maintenance Or Emergency Backup to 4K Built in K + 35K Shield Refrigeration Or 20 grams/sec Liquefaction Can no longer meet static load of all cryomodules in emergency backup mode Thomas Jefferson National Accelerator Facility Page 17

17 Questions? May we answer any questions? Thomas Jefferson National Accelerator Facility Page 18

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