G.R. Lambertson

Lawrence Berkeley National Laboratory

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F. Voelker

European Organization for Nuclear Research

W. Bȧrry

Lawrence Berkeley National Laboratory

J. Rechen

Lawrence Berkeley National Laboratory

D.A. Goldberg

Tel Hai Academic College

R. Meuser

Lawrence Berkeley National Laboratory

L.J. Laslett

University of California, Berkeley

W. S. Gilbert

Elman Retina Group

W. A. Wenzel

Lawrence Berkeley National Laboratory

J. Corlett

MacEwan University

J.M. Peterson

Osaka University

Cooperative Institutions

Lawrence Berkeley National Laboratory

134

University of California, Berkeley

106

SLAC National Accelerator Laboratory

Stanford Synchrotron Radiation Lightsource

Stanford University

Fermi National Accelerator Laboratory

Menlo School

Brookhaven National Laboratory

Fusion Academy

Argonne National Laboratory

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Items from the Construction of ESCAR

IEEE Transactions on Nuclear Science (1977)

R. Byrns W. S. Gilbert G.R. Lambertson R. Meuser J. Rechen

ESCAR is an experimental superconducting accelerator which is being built at Lawrence Berkeley Laboratory to gain timely, full-scale experience in the construction and operation of a fully cryogenic accelerator. A report is given of the construction of several non-conventional items.

Cryogenics

Superconducting Super Collider

Superconducting Coils

10.1109/tns.1977.4328933

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Beam Impedance Measurements on the ALS Sector Tank

Robert Rimmer D.A. Goldberg Arne F. Jacob G.R. Lambertson F. Voelker

The 10 m long ALS curved sector tank is formed from two shells out of which the beam chamber is machined. Vacuum pumping and photon stops are located in an antechamber connected to the beam tube through a 1cm slot. In order to determine whether the beam is significantly coupled to the antechamber, measurements of longitudinal beam impedance were performed up to 26 GHz, well above the cutoff frequency of the beam pipe. Two different schemes were used: In the first, the wire method was adapted for use above cutoff; in the second, the impedance was detected from the response to TM-waves propagated in the aperture without a wire. Temperature at various locations in the setup was recorded for later phase corrections. Antennas were placed in the antechamber to detect radiated power or possible resonances. A reference measurement was made with the slot sealed by a flexible gasket of knitted wire. The seal was then removed and the response with antechamber recorded. The response was checked by inserting obstacles of known impedance. Both measurement methods provided low numbers with Z/n<0.001 Ohm over the whole frequency range. No resonances attributable to the antechamber were observed. 3 refs., 6 figs.

Aperture (computer memory)

Cutoff frequency

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Feasibility of a storage ring for polar molecules in strong-field-seeking states

The European Physical Journal D (2004)

Hiroshi Nishimura G.R. Lambertson J.G. Kalnins Harvey Gould

Bunches

Chemical polarity

Lattice (music)

10.1140/epjd/e2004-00153-8

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Slotted coax as a beam electrode

G.R. Lambertson K.J. Kim F. Voelker

The slot coupled TEM line has been employed at CERN as a pick up electrode in the GHz range. It is a compact and broad band device, and will be quite attractive if the coupling efficiency is competitive with an array of quarter wave loops. In this paper, we study various properties of such a structure.

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HANDLING FIELD NONLINEARITIES IN THE BEVATRON RESONANT EXTRACTION

Robert W. Allison Hermann A. Grander G.R. Lambertson

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Electron Positron Factories

OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (2007)

Michael S. Zisman S Chattopadhyay Alper A Garren G.R. Lambertson E. D. Bloom

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Testing of accelerator dipoles in pressurized superfluid helium

W. S. Gilbert S. Caspi W. Hassenzahl G.R. Lambertson R. Meuser

Two superconducting accelerator dipole magnets, with different internal construction features, have been tested in pressurized superfluid helium (1.8K, 1.2 atmosphere) as well as in regular pool boiling helium (4.4K, 1.2 atmosphere) helium. The coils of one magnet were moderately pre-stressed, and 4.2K design performance was rapidly achieved in the superfluid. The other magnet had very low coil pre-stress, reduced helium ventilation, and displayed degraded performance, even in the superfluid helium.

Lambda point refrigerator

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Stochastic Cooling of 200 MeV Protons

G.R. Lambertson J.J. Bisognano W. S. Flood L.J. Laslett C. Leemann

Vertical and longitudinal cooling has been achieved at the FNAL 200 MeV cooling ring.Initial longitudinal cooling times of 20 seconds for 1.5 x 106 circulating protons are in approximate agreement with calculations based on measured system parameters.The cooling systems have an electronic bandwidth of -300 ~iHz, travelling wave pickups and kickers and a notch filter using flexible cable.The TW structures provide a good signal-to-noise ratio and reduce output power requirements.

10.2172/1985098

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Beam dynamics in a storage ring for neutral (polar) molecules

G.R. Lambertson

The force from a non-uniform electric field on the electric dipole moment of a molecule may be used to circulate and focus molecules in a storage ring. The nature of the forces from multipole electrodes for bending and focusing are described for strong-field-seeking and for weak-field-seeking molecules. Fringe-field forces are analyzed. Examples of storage ring designs are presented; these include long straight sections and provide bunching and acceleration.

Chemical polarity

10.1109/pac.2003.1288937

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Design, construction, and operation of 12 ESCAR bending magnets

IEEE Transactions on Magnetics (1979)

G.R. Lambertson Avis Borden John Cox William F. Eaton W. Gilbert

10.1109/tmag.1979.1060067

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