Cryomodule design for the rare isotope accelerator

Grimm, Terry; Hartung, W.; Johnson, M.; York, R. C.; Kneisel, P.; Turlington, L.

doi:10.1109/pac.2003.1289702

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…Figure 13 shows the temperature profile along the outer conductor, which has a liquid nitrogen intercept. Note that the distribution shown in Figure 13 is slightly different from the preliminary distribution presented previously [21]. The helium and nitrogen load are 1.6 and 4 W per coupler respectively.…”

Section: Input Couplermentioning

confidence: 57%

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805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

Bricker¹,

Compton²,

Hartung³

et al. 2008

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A 6-cell 805 MHz superconducting cavity for acceleration in the velocity range of about 0.4 to 0.53 times the speed of light was designed. After single-cell prototyping, three 6-cell niobium cavities were fabricated. In vertical RF tests of the 6-cell cavities, the measured quality factors (Q 0 ) were between 7 · 10 9 and 1.4 · 10 10 at the design field (accelerating gradient of 8 to 10 MV/m). A rectangular cryomodule was designed to house 4 cavities per cryomodule. The 4-cavity cryomodule could be used for acceleration of ions in a linear accelerator, with focussing elements between the cryomodules. A prototype cryomodule was fabricated to test 2 cavities under realistic operating conditions. Two of the 6-cell cavities were equipped with helium tanks, tuners, and input coupler and installed into the cryomodule. The prototype cryomodule was used to verify alignment, electromagnetic performance, frequency tuning, cryogenic performance, low-level RF control, and control of microphonics.

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Section: Input Couplermentioning

confidence: 57%

“…Results on the multi-cell cavity vertical tests have also been previously reported [19,20]. Additional papers have been published on the cryomodule design [21] and on the measurements on the prototype cryomodule [22].…”

Section: Introductionmentioning

confidence: 97%

805 MHz Beta = 0.47 Elliptical Accelerating Structure R & D

Bricker¹,

Compton²,

Hartung³

et al. 2008

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“…The same basic design can be used for all of the superconducting cavity and magnet types needed for the linac. A prototype 2-cavity cryomodule for β = v/c = 0.47 elliptical cavities was designed in 2003 [2] and tested in 2004 [3]. This cryomodule design is suitable for the FRIB upgrade, which would require elliptical cavities with β = 0.61 and β = 0.81.…”

Section: Introductionmentioning

confidence: 99%

RIA Superconducting Drift Tube Linac R & D

Popielarski¹,

Bierwagen²,

Bricker³

et al. 2009

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Cavity and cryomodule development work for a superconducting ion linac has been underway for several years at the National Superconducting Cyclotron Laboratory. The original application of the work was the proposed Rare Isotope Accelerator. At present, the work is being continued for use with the Facility for Rare Isotope Beams (FRIB). The baseline linac for FRIB requires 4 types of superconducting cavities to cover the velocity range needed to accelerate an ion beam to ≥ 200 MeV/u: 2 types of quarterwave resonator (QWR) and 2 types of half-wave resonator (HWR). Superconducting solenoids are used for focussing. Active and passive shielding is required to ensure that the solenoids' field does not degrade the cavity performance. First prototypes of both QWR types and one HWR type have been fabricated and tested. A prototype solenoid has been procured and tested. A test cryomodule has been fabricated and tested. The test cryomodule contains one QWR, one HWR, one solenoid, and one super-ferric quadrupole. This report covers the design, fabrication, and testing of this cryomodule.

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“…Two niobium multi-cells and one copper multicell have been tuned for field flatness. The next step will be a horizontal test of 2 fully-equipped β g = 0.47 cavities in a prototype cryomodule [14].…”

Section: Resultsmentioning

confidence: 99%