1. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 1 NSTX Supported by Vacuum Pumping, Gauging and RGA Systems W. Blanchard Princeton Plasma Physics Laboratory NSTX Upgrade Project Final Design Review LSB, B318 June 22-24, 2011 Culham Sci Ctr U St. Andrews York U Chubu U Fukui U Hiroshima U Hyogo U Kyoto U Kyushu U Kyushu Tokai U NIFS Niigata U U Tokyo JAEA Hebrew U Ioffe Inst RRC Kurchatov Inst TRINITI NFRI KAIST POSTECH ASIPP ENEA, Frascati CEA, Cadarache IPP, Jülich IPP, Garching ASCR, Czech Rep Columbia U CompX General Atomics FIU INL Johns Hopkins U LANL LLNL Lodestar MIT Nova Photonics New York U ORNL PPPL Princeton U Purdue U SNL Think Tank, Inc. UC Davis UC Irvine UCLA UCSD U Colorado U Illinois U Maryland U Rochester U Washington U Wisconsin

2. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 Overview of Existing TVPS Configuration Most of the NSTX vacuum pumping system and gauging systems will be reconfigured to accommodate 2 nd neutral beam, including: –Pumpduct –TMPs –RGA system –Capacitance manometers –Ion gauge assemblies Pumpduct –24” diameter and 18’ in length –Bellows and ceramic break TMP Ceramic Break IGs CMs RGA System Roughing Port Bellows

3. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 3 Existing TVPS Configuration TMPs –~ 19’ from center of NSTX –magnetic field < 50 gauss without any shielding –two 1500 l/s pumps –TVPS D 2 pumping speed ~1650 l/s RGA System –located at the end of the pumpduct –differentially pumped system consists of separate TMP vacuum system and orifice valve capable of sampling VV conditions at relatively high pressures such as GDC Capacitance manometers –located at the end of the pumpduct –3 gauges (1, 10 and 1000 Torr) –1 and 10 Torr gauges used for GDC and calibrations Ion Gauge Assemblies –two ion gauge assembles –located on pumpduct near the vacuum vessel –each ion gauge housed in magnetic shielding 1500 l/s TMPs Ion Gauges TF Coil TVPS Configuration 19 ft (to center of NSTX) RGA and CMs

4. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 4 TVPS Upgrade Configuration Pumpduct assembly: –two assemblies located underneath the 2 nd NB transition duct –14” od and 72” in length –ceramic break and bellows legacy assemblies 12.5” id x 13” long –12” gate valve –two adapter spool pieces above and below gate valve –TMPs –gauging –roughing port

5. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 5 TMPs and Magnetic Shielding TMPs –located 11.5’ from center of NSTX –placed near test cell floor –require magnetic shielding –2650 l/s D 2 pumping speed each –calculated D 2 pumping speed of vacuum pumping system is ~ 3050 l/s Magnetic shields –½” thick low carbon steel cylinders –17 ½” od extending 6” above and below TMP –reduces the magnetic field to less 50 gauss

6. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 6 TMP and RGA Support Stands Two support stand assemblies for various loads: –approx. 600 lbs weight –approx. 1800 lbs vacuum load –less than 50 lbs from magnetic forces –approx. 5700 ft-lbs torque for worst case TMP failure –additionally the 2 nd stand supports the RGA assembly Support stand: –approx. 34” high with 3” aluminum legs bolted to ½” SS plate and floor –cross braces with G-10 brackets for electrical isolation

7. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 7 RGA and Gauging Overview Ion gauge assembly on each pumping duct RGA and capacitance manometer assemblies on separate ducts All assemblies located between the duct and the neutral beam box

8. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 8 CM and Ion Gauge Assemblies CM assembly : –1, 10 and 1000 Torr gauges –CB/bellows assembly –pumpout and isolation valve –¼” thick SS support plate welded to spool piece above HVV Ion gauge assemblies : –two miniature ion gauges –CB/bellows assembly –pumpout and isolation valve –low carbon steel shield cylinder – SS brackets and support plate welded to duct – shields u-bolted to support plate

9. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 9 RGA System Same differentially pumped configuration as existing system on NSTX RGA assembly : –TMP and forepump –CB and bellows –interface, orifice and TMP isolation valves – ion gauge and CMs –two RGAs for trend monitoring and after shot outgassing Small TMP will also shielded from magnetic fields Same capabilities for measurements across a wide range of pressures

10. NSTX Upgrade Project – Final Design Review June 22 - 24, 2011 10 Slide title TMPs near test cell floor and shielded with ½” carbon steel cylinder Magnetic field reduced to less than 50 gauss RGA system configuration similar to existing system Increased D2 pumping speed ~1650 => ~3050 l/s Design and modeling are complete 5 of 8 drawings completed, including most required for fabrication of parts (~90%) No open items from previous reviews No outstanding risks No significant change in cost 1010 NSTXNSTX April 19, 2011NSTX NB Upgrade Peer Review Summary 10