Non-evaporable getter investigation at the National Synchrotron Light Source

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:5461008

Halama, H J; Guo, Y

We report H{sub 2}, CO and CO{sub 2} pumping speed measurements on a linear pump using NEG strip St 707 (Saes Getters Inc) as a function of both absorbed gases and number of activations. To simulate the conditions of an operating storage ring a gas mixture of 50% H{sub 2}, 35% CO and 15% CO{sub 2} is used in all measurements. Initial measured pumping speeds of >450{ell} m {sup {minus}1} s{sup {minus}1} decrease to 200 and 100{ell} m{sup {minus}1} s{sup {minus}1} for H{sub 2} and CO, respectively, after 70 air exposures. A further drop to 50{ell} m{sup {minus}1} s{sup {minus}1} for CO occurs at CO loading of 1 {times} 10{sup {minus}2} Torr {ell} m{sup {minus}1}. CO{sub 2} and CO pumping speeds are about the same. The photon stimulated desorption (PSD) for both baked and activated strips is an order of magnitude lower than that for stainless steel. 7 refs., 7 figs.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5461008
• Report Number(s): BNL-46473; CONF-901035--20; ON: DE91017005
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
430400 -- Particle Accelerators-- Storage Rings
ADSORPTION
AIR
ALLOYS
BOSONS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CLEANING
ELEMENTARY PARTICLES
ELEMENTS
FLUIDS
GASES
GETTERS
HEAT TREATMENTS
HIGH ALLOY STEELS
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
MASSLESS PARTICLES
NITROGEN
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOTONS
PUMPING
SERVICE LIFE
SORPTION
STAINLESS STEELS
STEELS
STORAGE RINGS
SURFACE CLEANING
SURFACE FINISHING
TESTING
VACUUM SYSTEMS