NCSX Project MeetingVacuum System Update

March 21, 2003

Bill Blanchard

&

Tom Provost

For FY03: * Evaluate PBX Pumps for Possible Use on NCSX

- Mechanical Pumps

- TMPs

NCSX Project Meeting

March 21, 2003 3

Mechanical (Backing) Pumps

• 4 Welch 55 cfm pumps

• All pumps run >48 hours

• Blankoff pressure <2.5 mT

• New shaft seals and belts (about $2000- to refurbish all pumps in-house)

NCSX Project Meeting

March 21, 2003 4

Backing Pumps (cont.)

• Pump rebuild cost offsite is approx. $1700- per pump

• Equivalent new pumps approx. $9000- each

• 2 additional pumps (1 complete as possible replacement and 1 for parts)

• Pumps look ok for NCSX use with new shaft seals and belts

NCSX Project Meeting

March 21, 2003 5

Roughing Pump

• Kinney KT500 (500 cfm)

• Pump not yet drained or tested

• Water cooling system decommissioned

• Attempt to start in 1995 was unsuccessful for unknown reasons

• Replacement cost is approx. $30,000-

NCSX Project Meeting

March 21, 2003 6

TMPS

• 4 - 1500 l/sec L-H TMPs

• 1 pump in use on MRX

• 1 pump spun at low speed to test a power supply

• Rotors spin freely on remaining 2 pumps

• Fixture being fabricated to fully test pumps (tests completed in approx. 3 weeks)

NCSX Project Meeting

March 21, 2003 7

TMP Power Supplies• 6 power supplies• 4 are operable and 2 are not• 1 power supply used on MRX• Shortage of cables• Offsite companies repair power supplies (if

needed)• TMP evaluation looks ok up to this point for use

on NCSX

NCSX Project Meeting

March 21, 2003 8

Other Business

• Henry Kugel and Bill Blanchard reviewed initial space requirements on the main port covers with Tom Brown

• One fueling injector per period (total of three)

• One standard ion gauge per period

• One GDC probe and starter filament per period (total of 3 each)

• One inboard injector (used for gas or pellets) per period

• One outboard supersonic gas injector per period