Oak Ridge, TN, United States
Oak Ridge, TN, United States

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Dechery F.,University of Strasbourg | Dechery F.,French National Center for Scientific Research | Savajols H.,GANIL | Authier M.,CEA Saclay Nuclear Research Center | And 39 more authors.
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2016

The Super Separator Spectrometer (S3) facility is developed in the framework of the SPIRAL2 project [1]. S3 has been designed to extend the capability of the facility to perform experiments with extremely low cross sections, taking advantage of the very high intensity stable beams of the superconducting linear accelerator of SPIRAL2. It will mainly use fusion-evaporation reactions to reach extreme regions of the nuclear chart: new opportunities will be opened for super-heavy element studies and spectroscopy at and beyond the driplines. In addition to our previous article (Déchery et al. [2]) introducing the optical layout of the spectrometer and the expected performances, this article will present the current status of the main elements of the facility: the target station, the superconducting multipole, and the magnetic and electric dipoles, with a special emphasis on the status of the detection system SIRIUS and on the low-energy branch which includes the REGLIS3 system. S3 will also be a source of low energy radioactive isotopes for delivery to the DESIR facility. © 2016 Elsevier B.V.


Tartaglia M.A.,Fermi National Accelerator Laboratory | Burkhardt E.,Cryomagnetics Inc. | Leach T.,Cryomagnetics Inc. | Orris D.F.,Fermi National Accelerator Laboratory | And 3 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2010

A compact RD RF linac is being built at Fermilab to study several key technologies related to accelerating high intensity beams. One of the goals is reduction of beam losses through the use of solenoid lenses in the low energy front end of the linac. A total of 23 compact, high field, superconducting solenoids have been procured by Fermilab for the first (room-temperature RF) section of the linac. In this report we summarize the quench and magnetic performance of the lenses. © 2006 IEEE.


Burkhardt E.,Michigan State University | Chlachidze G.,Fermi National Accelerator Laboratory | DiMarco J.,Fermi National Accelerator Laboratory | Leach T.,Cryomagnetics Inc. | And 5 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2015

A superconducting solenoid-based focusing lens was designed and built for use in the SSR1 cryomodule of PXIE test facility at FNAL. As the cryomodule contains superconducting spoke-type cavities, one of main goals during design stage was minimization of magnetic field on walls of the cavities. The design also attempted minimization of the uncertainty of the magnetic axis position in the lens. This report describes main features of the design and summarizes results of performance tests and magnetic axis position measurements. © 2014 IEEE.


Martovetsky N.N.,Lawrence Livermore National Laboratory | Berryhill A.B.,Cryomagnetics Inc. | Kenney S.J.,Oak Ridge National Laboratory
IEEE Transactions on Applied Superconductivity | Year: 2012

The ITER Central Solenoid has 36 interpancake joints, 12 bus joints, and 12 feeder joints in the magnet. The joints are required to have resistance below 4 nOhm at 45 kA at 4.5 K. The US ITER Project Office developed two different types of interpancake joints with some variations in details in order to find a better design, qualify the joints, and establish a fabrication process. © 2002-2011 IEEE.


Berryhill A.,Cryomagnetics Inc. | Spoor P.-S.,Chart Biomedical
AIP Conference Proceedings | Year: 2012

High frequency (>30 Hz) 'pulse tube' coolers are often observed to perform well even when the 'pulse tube,' or thermal buffer tube, is in an orientation other than cold-end down, counter to the intuition that a column of gas with the colder, denser region above the warmer region is not convectively stable. In a recent paper, Swift and Backhaus advance a theory to explain this phenomenon, and offer some guidelines for a 'tip-safe' design. The present work offers some tipped vs. vertical data for a number of different sized pulse tube coolers, and compares the results to the theory of Swift and Backhaus. In general it is found that the results are in qualitative agreement with their theory, but that the 'safety factor' in a pulse tube design must be several times higher than their work suggests, to ensure orientation independence. © 2012 American Institute of Physics.

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