[en] In a magnetically confined sputter-ion vacuum pump a multi-apertured anode electrode is interposed between a pair of reactive cathode electrode plates. An evacuable envelope encloses the anode and cathode electrodes and a magnetic circuit surrounds the vacuum envelope for producing a glow discharge confining magnetic field extending axially of the apertures in the anode. The reactive cathode plates include peripheral sealing flanges for compressing a sealing gasket into sealing engagement with a pair of sealing surfaces at opposite ends of a tubular main body portion of the envelope. A clamping ring structure, having a bolt circle formed therein, serves to clamp the two reactive cathode plates to the main body and also serves as an integral part of the magnetic circuit. Water coolant channels are brazed to the outer surfaces of the cathode plates for cooling same in use. The magnetic circuit includes a pair of ferrite magnets disposed outside the envelope on opposite sides of the cathodes and enclosed by a magnetic yoke to minimize the size and weight of the magnet and to reduce unwanted stray magnetic fields

[en] Published in summary form only

[en] An integrated sputter-ion pump, specially designed for the use in high magnetic fields < 1 T is presented. The pump module (300 mm long, 30 mm wide and 16 mm high) is made of 4 strips of titanium alloy packed in a sandwich structure; the outer pair serves as the cathodes, each of the inner strips is perforated by 389 holes of 4 mm diameter. They are aligned coaxially such as to form the usual anode cell configuration. The design was computer-optimized, using the semiempirical formulism by Hartwig and Kouptsidis. Pumping speed measurements were carried out in the range 10^-10 to 10^-7 Torr for air as a function of the magnetic field, the residual gas pressure and the anode voltage. The pumping speed above the transition field of about 0.5 T (at 10^-8 Torr and 3 kV) is about 50 l/s and constant up to at least 1.8 T

[en] The main vacuum pumping equipment of the SPS vacuum system at CERN consists of two types of sputter ion pumps: about 650 pumps with 35 l/s speed in the normal sectors and 160 pumps with 420 l/s in the sections with special equipment. Reported are some of the experiments with theses pumps from the test phase of the prototypes and the initiating period of the SPS. It results that the pumps: - hold a working pressure 10 times below the original design value, - will allow the continuous running of the accelerator if the local pressure increase can be held below 1.10^-5 mbar, - have a life time of about 1000 hours at a pressure of 4.10^-5 mbar

[en] It is shown that significant H₂ pumping occurs in the walls of triode pumps. Also, H₂ is pumped in the anode cells of sputter-ion pumps. This pumping occurs in a manner similar to that by which the inert gases are pumped. That is, H₂ pumped in the walls of the anode cells by high energy neutral burial. Hydrogen in the pump walls and anodes limits the base pressure of the pump. 13 refs., 5 figs., 1 tab

[en] Many physics experiments used for nuclear diagnostics measure low energy particle emission as a function of time. Transmission of these particles from source to detector typically must occur in a rarefied or vacuum environment. In instances where the experiment is buried in the earth, ion pumps have been successfully used to produce vacuum pressures on the order of 10^-4 Pa (10^-6 torr). In this application, ion pumps offer significant advantages compared to other pump types. Because of their simplicity, ion-pumped vacuum systems are inherently reliable. Only one coaxial cable is required to both power the system and monitor the pressure. Ion pumps remove gas through an ionization process. Since the vacuum pressure is directly proportional to ion current at these pressures, no additional instrumentation is required for pressure measurement. Some of the specifics associated with these systems and some of the steps taken to assure system reliability are discussed

[en] A new design for the vacuum system of an electron-positron storage accelerator (the TRISTAN project: 30 GeV, 10 mA x 10 mA) is presented

[en] Methane pumping out by a small-sized gadolinium two type pumps is investigated. Speed of methane pumping attains 40% that of nitrogen pumping out. Introduction of additional electrode - ionizer-grid, causes increase of the speed of methane pumping out from 3x10^-4 to (85-6)x10^-4 m³s^-1

[en] Distributed ion pumps (DIPs) will be used for the beam vacuum system of the g-2 muon storage ring. The magnetic field intensity and alignment angle at the DIP locations are not uniform. The pumping behavior of several different ion pump elements under this non-uniform magnet field has been studied. The results are compared with the theoretical predictions. Based on these results, the optimum design of the g-2 DIPs has been developed

[en] Problems relating to physical processes defining operation of getter pumps are presented