Commissioning and Operational Experience from FRIB Target and Fragment Pre-separator Superconducting Magnet Quench Management System

Hasan, Nusair; Ganni, Venkatarao; Knudsen, Peter; Casagrande, Fabio; Laumer, Brandon; Bott, Stuart

doi:10.1007/978-981-99-6128-3_30

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…In addition to upgrades of the aging equipment and legacy SC magnets (discussed in section 6.2), adoption of a quench recovery system for future expansion of the facility is also being considered. The newly commissioned SC magnets for the FRIB target and pre-separator segment (designed for higher operating pressure) incorporates such a system [29,30], which has shown excellent performance so far [31].…”

Section: Cryogenicsmentioning

confidence: 99%

Technological developments and accelerator improvements for the FRIB beam power ramp-up

Wei,

Alleman,

et al. 2024

J. Inst.

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The Facility for Rare Isotope Beams (FRIB) began operation with 1 kW beam power for scientific users in May 2022 upon completion of 8 years of project construction. The ramp-up to the ultimate beam power of 400 kW, planned over a 6-year period, will enable the facility to reach its full potential for scientific discovery in isotope science and applications. In December 2023, a record-high beam power of 10.4 kW uranium was delivered to the target. Technological developments and accelerator improvements are being made over the entire facility and are key to completion of the power ramp-up. Major technological developments entail the phased deployment of high-power beam-intercepting systems, including the charge strippers, the charge selection systems, the production target, and the beam dump, along with support systems, including non-conventional utilities (NCU) and remote handling facilities. Major accelerator improvements include renovations to aging legacy systems associated with experimental beam lines and system automation for improved operational efficiency and better machine availability. Experience must be gained to safely handle the increased radiological impacts associated with high beam power; extensive machine studies and advanced beam tuning procedures are needed to minimize uncontrolled beam losses for the desired operating conditions. This paper discusses the technological developments and accelerator improvements with emphasis on major R&D efforts.

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Section: Cryogenicsmentioning

confidence: 99%

Technological developments and accelerator improvements for the FRIB beam power ramp-up

Wei,

Alleman,

et al. 2024

J. Inst.

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“…The superconducting magnets and their associated cryogenic distribution (see ES Distribution, Figure 1) for this segment were designed and commissioned recently (CY2020-22) [7] as part of the FRIB project. A unique superconducting magnet quench recovery system as well as a controlled cool-down system were also designed, commissioned, and integrated as part of this cryogenic distribution system [8].…”

Section: Present Cryogenic Loads and Configurationmentioning

confidence: 99%

Process design for FRIB’s experimental refrigeration system

Hasan,

Ganni,

Knudsen

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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The experimental system (ES) for the Facility for Rare Isotope Beams (FRIB) at Michigan State University (MSU) has several segments. Following the acceleration through the three superconducting LINAC segments, the heavy ion beam is guided through the target, a fragment pre-separator and (the A1900) separator segments. There are many beam lines and then it can be split and sent to various experimental vaults and instrumentation, e.g. S800 spectrograph, and the newly proposed High Rigidity Spectrometer (HRS). Presently, superconducting magnets at the target and fragment pre-separator segments, along with the LINAC superconducting cryo-modules, are supported by FRIB’s main central helium liquefier/refrigerator (CHL). The remainder of the cryogenic loads are supported by the legacy NSCL Cryogenic Refrigerator (a re-commissioned Bureau of Mines helium liquefier from the mid 1970’s) and has many obsolete components for reliable operation. Considering the operational reliability of the accelerator, maintainability of the entire cryogenic system at FRIB and ever-growing experimental beam lines – it is logical to segregate the experimental system loads from the accelerator system loads. A new 4.5 K refrigerator along with a thermal shield (55 K) refrigerator are planned to support the operation of these experimental system (ES) loads and make plans for the CHL maintenance. These refrigerators will be able to support a combination of 4.5 K isothermal refrigeration, 4.5 K liquefaction (for magnet lead cooling and transients) and thermal radiation shield loads. The design loads, modes of operation and the planned operation of the FRIB cryogenic system with these refrigeration systems are discussed. This paper outlines the key selection parameters and design modes for the major components, such as the warm compressors, turbo-expanders and heat exchangers.

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