JLab Cryogenic Plant Capacities March 26, 2010 Rao Ganni http://www.jlab.org/div_dept/dir_off/ccr/ Thomas Jefferson National Accelerator Facility
Cryogenic Plant Locations & Interconnecting Transfer Lines Thomas Jefferson National Accelerator Facility Page 2
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
Typical Transfer Lines 4K, Warm Helium & LN2 Transfer Lines CHL to ESR Thomas Jefferson National Accelerator Facility Page 4
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
JLab Cryogenic Plant Capacities Thomas Jefferson National Accelerator Facility
CHL Max Capacity Current 6 GeV (CHL #1) Load: 4.25 kw @ 2.1K, 11.65 kw @ 35K Capacity: 4.6 kw @2.1K, 12 kw @ 35K 10 g/s liquefaction @ 4.5K New 12 GeV (CHL #1 + new CHL#2) Load: 7.4 kw @ 2.1K, 14.65 kw @ 35K Capacity: 8.8 kw @ 2.1K, 24 kw @ 35K 10 g/s (CHL#1) plus 15 g/s (CHL#2) of liquefaction Thomas Jefferson National Accelerator Facility Page 7
11126 GeV CEBAF Upgrade magnets and power supplies CHL-2 Two 0.6 1.1 GV linacs Enhanced capabilities in existing Halls Lower pass beam energies still available Thomas Jefferson National Accelerator Facility Page 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
Requirement: LINAC TRANSFER LINES NEW FOR 12 GeV NEW 12 GeV 600W @2.1K on SL Thomas Jefferson National Accelerator Facility Page 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 530 7000 1 530 7000 0.57 302 3990 0.43 228 3010 Original CM s 16 110 42.25 676 4648 22.25 356 2448 20 320 2200 12 GeV CM s 50 250 5 250 1250 5 250 1250 Dynamic Original CM s 72 42.25 3042 22.25 1602 20 1440 12 GeV CM 250 50 5 1250 250 5 1250 250 TL BAYONETS 75 75 Totals 42.25 4248 11648 25.25 3835 7938 29.25 3563 6710 TL SECTION Capacities (W) CHL#1 (W) 4600 12000 4400 12000 % of Full Load 92% 97% 87% 66% CHL#2(W) 4400 12000 % of Full Load 81% 56% Adding Existing 600W @ 2K for FEL on South Linac, ~95% Loading @2K for CHL#2 Thomas Jefferson National Accelerator Facility Page 12
ESR CRYOGENIC CAPACITY Serves Experimental Halls A,B,C Built in 1977 PROVIDES 1500W @4K 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
CTF CRYOGENIC CAPACITY Built in1989 35K Shield Refrigerator and 2K Liquefier 1kW @ 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
HALL D CRYOGENIC CAPACITY Built 1980 Hall D 4.5K Refrigerator 200W @ 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
ESR#2 REFRIGERATOR CAPACITY (Unfunded BIA, Not Installed) Proposed Refrigerator to Boost 6 GeV Program Fabricated in 1992 4kW @ 4K Refrigeration Or 5 kw @ 20K Refrigeration (modified cold box) Thomas Jefferson National Accelerator Facility Page 16
STANDBY REFRIGERATOR (SBR) CAPACITY Replaces CHL during CHL Major Maintenance Or Emergency Backup to CHL @ 4K Built in 1996 1.8kW @ 4K + 12kW @ 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
Questions? May we answer any questions? Thomas Jefferson National Accelerator Facility Page 18