Cyclotrons2016 - List of Keywords (cryogenics)

Paper	Title	Other Keywords	Page
TUA01	Offline Tests with the NSCL Cyclotron Gas Stopper	ion, cyclotron, extraction, vacuum	121
	S. Schwarz, K.R. Lund, D.J. Morrissey, J. Ottarson, C. Sumithrarachchi NSCL, East Lansing, Michigan, USA G. Bollen, S. Chouhan, J. DeKamp, M.A. Green, C. Magsig, A.C.C. Villari, A.F. Zeller FRIB, East Lansing, Michigan, USA G. Bollen MSU, East Lansing, Michigan, USA
	Funding: This work is supported by NSF under grants PHY-09-58726 and PHY-11-02511 Rare isotopes are produced at the NSCL by projectile fragmentation at energies of ~100 MeV/u. The NSCL has successfully used linear gas stopping cells for more than a decade to decelerate projectile fragments to the keV range; first for experiments at low-energy and more recently for reacceleration. A novel reverse-cyclotron has been constructed by the NSCL based on a superconducting sectored-cyclotron magnet and LN2-cooled He gas to confine and slow down the fragments. Efficient stopping is predicted even for light ions that are difficult to thermalize in linear gas cells. The thermalized ions are transported to the center by a radial RF-carpet system, extracted through the yoke with an ion conveyor and accelerated to <60 keV for delivery to users. Measured field profiles have confirmed field calculations. The cryogenic beam-stopping chamber has been installed inside the magnet. The RF ion-guiding components have been tested successfully offline and are being prepared for low-energy ion-transport tests inside the magnet. A summary of the expected performance, the status of the machine, and results from recent low-energy transport tests will be presented.
	Slides TUA01 [3.816 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP01	Development and Validation of a Fast Cryocooler Maintenance System	operation, vacuum, controls, ion	301
	V. Nuttens, E. Forton, T. Lamon, Y. Paradis IBA, Louvain-la-Neuve, Belgium A. Zhukovsky M.I.T. Plasma Science and Fusion Center, Cambridge, USA
	At IBA, we have been developing and testing new systems to simplify cryocooler maintenance at a minimal cost (material, interruption of service). A local heating system has been designed to heat-up both stages of a cryocooler to room temperature while keeping the cold mass at a low temperature. The heating system has to fulfill severe requirements such as high power density, compatibility with vacuum and low temperature, and easy operation. The whole system has been designed and tested in a dedicated test bench and then duplicated onto a full-size superconducting coil. It has been extensively tested under different conditions to prove that the heating system is robust and reliable and has no impact on the superconducting coil performance.
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP10	Status and Upgrade of the Cryogenic Plant of the LNS Superconducting Cyclotron After 25 Years of Operation	cyclotron, extraction, vacuum, radiation	325
	F. Noto, M. Cafici, A. Carbonaro, A. Di Stefano, A. Pagano, F. Speziale INFN/LNS, Catania, Italy
	The Superconducting Cyclotron (CS) is a compact ac-celerator with three sectors with a wide operating dia-gram, capable of accelerating heavy ions with values q/A from 0.1 to 0.5 up to energies from 10 to 80 MeV/u. An upgrade of the CS superconducting magnet is in progress to extend the capability of the machine to high intensity beam facilities. In this paper we describe the status of CS Cryostat and its Cryogenic Plant after 25 years of continuous opera-tions at 4.2 K with the exception of the stop of about one year for the tenth test and the stop for restoring of the liquefier and the main issues happened during that long time. We describe the last complex and demanding pro-cedure for the revamping of the He liquefier, its ancillary parts, other cryogenic parts of the CS, with special atten-tion about the Piping and Instrumentation, gas analysis, Heat Exchangers, LN2 transfer lines, Human-Machine Interface, vacuum system for thermal isolation, GHe re-covery system and the optimization for the consumption of electrical power. In conclusion we describe some hypothesis about the future upgrade of the Cryogenic system and the new Cry-ostat of the CS, in special way we analyse an approach to redefine the interconnection, piping boundary line and cryogenic diagnostic.
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUA01

Offline Tests with the NSCL Cyclotron Gas Stopper

ion, cyclotron, extraction, vacuum

121

S. Schwarz, K.R. Lund, D.J. Morrissey, J. Ottarson, C. Sumithrarachchi
NSCL, East Lansing, Michigan, USA
G. Bollen, S. Chouhan, J. DeKamp, M.A. Green, C. Magsig, A.C.C. Villari, A.F. Zeller
FRIB, East Lansing, Michigan, USA
G. Bollen
MSU, East Lansing, Michigan, USA

Funding: This work is supported by NSF under grants PHY-09-58726 and PHY-11-02511
Rare isotopes are produced at the NSCL by projectile fragmentation at energies of ~100 MeV/u. The NSCL has successfully used linear gas stopping cells for more than a decade to decelerate projectile fragments to the keV range; first for experiments at low-energy and more recently for reacceleration. A novel reverse-cyclotron has been constructed by the NSCL based on a superconducting sectored-cyclotron magnet and LN2-cooled He gas to confine and slow down the fragments. Efficient stopping is predicted even for light ions that are difficult to thermalize in linear gas cells. The thermalized ions are transported to the center by a radial RF-carpet system, extracted through the yoke with an ion conveyor and accelerated to <60 keV for delivery to users. Measured field profiles have confirmed field calculations. The cryogenic beam-stopping chamber has been installed inside the magnet. The RF ion-guiding components have been tested successfully offline and are being prepared for low-energy ion-transport tests inside the magnet. A summary of the expected performance, the status of the machine, and results from recent low-energy transport tests will be presented.

Slides TUA01 [3.816 MB]

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP01

Development and Validation of a Fast Cryocooler Maintenance System

operation, vacuum, controls, ion

301

V. Nuttens, E. Forton, T. Lamon, Y. Paradis
IBA, Louvain-la-Neuve, Belgium
A. Zhukovsky
M.I.T. Plasma Science and Fusion Center, Cambridge, USA

At IBA, we have been developing and testing new systems to simplify cryocooler maintenance at a minimal cost (material, interruption of service). A local heating system has been designed to heat-up both stages of a cryocooler to room temperature while keeping the cold mass at a low temperature. The heating system has to fulfill severe requirements such as high power density, compatibility with vacuum and low temperature, and easy operation. The whole system has been designed and tested in a dedicated test bench and then duplicated onto a full-size superconducting coil. It has been extensively tested under different conditions to prove that the heating system is robust and reliable and has no impact on the superconducting coil performance.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP10

Status and Upgrade of the Cryogenic Plant of the LNS Superconducting Cyclotron After 25 Years of Operation

cyclotron, extraction, vacuum, radiation

325

F. Noto, M. Cafici, A. Carbonaro, A. Di Stefano, A. Pagano, F. Speziale
INFN/LNS, Catania, Italy

The Superconducting Cyclotron (CS) is a compact ac-celerator with three sectors with a wide operating dia-gram, capable of accelerating heavy ions with values q/A from 0.1 to 0.5 up to energies from 10 to 80 MeV/u. An upgrade of the CS superconducting magnet is in progress to extend the capability of the machine to high intensity beam facilities. In this paper we describe the status of CS Cryostat and its Cryogenic Plant after 25 years of continuous opera-tions at 4.2 K with the exception of the stop of about one year for the tenth test and the stop for restoring of the liquefier and the main issues happened during that long time. We describe the last complex and demanding pro-cedure for the revamping of the He liquefier, its ancillary parts, other cryogenic parts of the CS, with special atten-tion about the Piping and Instrumentation, gas analysis, Heat Exchangers, LN2 transfer lines, Human-Machine Interface, vacuum system for thermal isolation, GHe re-covery system and the optimization for the consumption of electrical power. In conclusion we describe some hypothesis about the future upgrade of the Cryogenic system and the new Cry-ostat of the CS, in special way we analyse an approach to redefine the interconnection, piping boundary line and cryogenic diagnostic.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)