RHIC detector beam-pipe pressures in time

Technical Report · Sun Feb 14 00:00:00 EST 1993

DOI:https://doi.org/10.2172/10141205· OSTI ID:10141205

Welch, K M

The pressures in baked an unbaked experimental beam-pipes are calculated as a function of time. These results exclude gas impact desorption effects stemming from, for example, species created by the colliding beams. Three general cases have been calculated: Case {number_sign}1: an unbaked system cryopumped by the 4.2{degree}K apertures of the DO magnets; Case {number_sign}4: an unbaked system pumped by the 4.2{degree}K apertures of the DO magnets, and with a 10,000 L/sec LHe cryopump located proximate to the DX magnets in the DX to D0 beam pipes; Case {number_sign}6: baked beam pipes pumped by the 4.2{degree}K apertures of the D0 magnets and sputter-ion pumps (i.e., SIPs), with non-evaporable getters (i.e., NEGs), bracketing the experimental beam-pipes. The infinite combinations of non-simultaneous system pumpdowns have been excluded as they are impossible to enforce or predict in the heat of operation.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 10141205
• Report Number(s): BNL-48660; AD/RHIC-118; ON: DE93010938
• Resource Relation: Other Information: PBD: 14 Feb 1993
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BROOKHAVEN RHIC
PIPES
DEGASSING
PRESSURE EFFECTS
BEAM TRANSPORT
TIME DEPENDENCE
COLLIDING BEAMS
CRYOPUMPS
SUPERCONDUCTING MAGNETS
RADIATION DETECTORS
430303
440104
EXPERIMENTAL FACILITIES AND EQUIPMENT
HIGH ENERGY PHYSICS INSTRUMENTATION