1. October, 2009 Cryogenics System Roberto Than October, 2009 Internal Review

2. October, 2009 Cryogenics System Cavity cooling:  1.9K @ cavities  1.8K @ HX / cold compressor bath  Quiet System: Vibration & microphonics  Heat transfer: SFTC or local evaporation  Quad cooling: 1.8K: Leads: HTS with shield flow as lead flow 4.5K: Leads: Normal leads. Sub-atmospheric system type/configuration Hybrid: Cold compression/ warm compression 100% cold compression New 4.5K plant @ 2 O’clock; Existing RHIC plant (1005) for Collider Use existing RHIC Plant for MeRHIC & RHIC New plant for both RHIC and MeRHIC

3. October, 2009 3 Cryogenics System SUPERFLUID HEAT TRANSFER: –SFT Conduction via pressurized superfluid  Heat exchanger every 3 cavities  ~ 8 inch Superfluid line  8 inch 12 Torr Vapor return line outside cryostat –2-  flow boiling (LHC) heat transfer from pressurized superfluid  Continuous heat exchanger / two-phase flow / vapor return –Saturation Line central vapor recondensing unit per 6 cavities

4. October, 2009 Cryogenics System LOADSDUTY  carnot W carnot POWER 1.8K REF5500 W0.180.95 MW SHIELD, 20K3000 W0.230.060.3 MW LIQUEFACTION12 g/s0.230.080.4 MW 5.7 MW LOADSDUTY 5-cell CAVITY1.8 K5000 W SHIELD19-20 K3000 W FPC’sLIQ10 g/s QUAD LEADSLIQ2 g/s QUADS1.8 or 4.5K~ 140 W

5. October, 2009 Cryogenics System-EXISTING RHIC PLANT LIFE CYCLE ISSUES Constructed in 1982-1985 15 MW compressors 4600 g/s flow Oil bearing turbo-expanders 2 Redundant Trains 2 x 6 expanders (T1-T6) Phase 3 upgrade (2006-07) Added new JT-loop gas bearing expander T7 + new cold end HX’s Compressor bodies regular overhaul Life cycle issues –Motors (600 HP, 2200HP) –Oil cooler / aftercooler heatexchangers –MCC / Breakers Main Cooling Towers,qty 6 –(15 MW) Liquid helium storage  Gas storage 

6. October, 2009 Cryogenics System EXISTING PLANT BURDENED with Contingency SUB ATMOSPHERIC SYSTEM @ 100226M RHIC PLANT UPGRADE @ 10058 M RHIC PLANT LIFE CYCLE ISSUES8 M NEW 4.5K PLANT BURDENED with Contingency SUB ATMOSPEHRIC SYSTEM @ 100226 M NEW PLANT @ 100239 M NEW PLANT @ 1005 for RHIC26 M

7. October, 2009 Estimate by phase with contingency

8. October, 2009 Labor hours, FTEs, $

9. October, 2009 Estimated Material $

10. October, 2009 BACKUP MATERIAL 10

11. October, 2009 11 Cryogenics System MeRHIC 5500 W@ 1.8K 10 g/s LIQ 3000 W Shield SUPERFLUID SYSTEMS

12. October, 2009 12 SUB-ATMOSPHERIC SYSTEM 4 100% COLD COMPRESSION 2K 4600 W Thomas Jefferson National Lab 2K 2400 W Spallation Neutron Source HYBRID COMPRESSION 1.8K 2400 W LHC –CERN 1.8K 5000 W BNL MeRHIC SUBATMOSPHERIC SYSTEM 4.5K plant 4.5K plant SUBATMOSPHERIC SYSTEM

13. October, 2009 13 SUB-ATMOSPHERIC SYSTEM 4 SHIELD FPC INTERCEPT 4.5K PLANT LN2

14. October, 2009 14 Cryogenics System.2 LOADING 4.5K PLANT & SUB-ATMOSPHERIC SYSTEM RHIC MeRHIC REFLIQSHIELDLOADLIQ SUBATM- WARM LOADW77352507429908 TK4.5 454.5 300 Patm4414440.5 ExJ/g1043.1 46101043 8334 TK4.53008519300 Patm1.28191.319 ExJ/g2395.57901.85681.04888.37901.86530.2 REFLIQSHIELDCOLDCOMPLIQVACCOMP  Ex J/g1352.46858.71071.03845.26858.71803.6 flowg/s4204412029612296 WcarnotMW0.5680.3020.1291.1380.0820.534  carnot 0.225 0.450 WactualMW2.521.340.575.060.371.1910.68

15. October, 2009 15 Cryogenics System System Level Design: 1.8K system –1.8K SUB-ATMOSPHERIC SYSTEM  Cold compressors single point failure –Redundant train –On shelf spare –Cryogenic distribution system / Superfluid heatexchangers Interface / Integration to 4.5K Plant –Return lines to RHIC Collider cryolines –Integration with RHIC main cryo plant –RHIC main cryo plant upgrade

16. October, 2009 16 Cryogenics System RHIC CRYO PLANT UPGRADE: –Rotoflow Expanders 5/6 to gas bearing expander –Cold (<10K) Heatexchanger stack HX-21-24 upgrade (Phase 3 HX’S too small) –JT-Expander T7 upgrade / or 2 nd JT-expander configuration –Tee-in for 20K return flow from 2 O’Clock CR/ U lines.