SPIRAL2/DESIR high resolution mass separator

Kurtukian‐Nieto, T.; Baartman, R.; Blank, Β.; Chiron, T.; Davids, C. N.; Delalee, F.; Duval, M.; Abbeir, S. El; Fournier, Amélie; Lunney, D.; Méot, F.; Sérani, Laurent; Stodel, M.-H.; Varenne, Franck; Weick, H.

doi:10.1016/j.nimb.2013.07.066

Cited by 18 publications

(12 citation statements)

References 9 publications

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“…In this case, a high resolution separator (HRS) must be set-up between the ions source and the experimental room. This solution has been developed in CENBG laboratory located in Bordeaux (France) and the beams properties must be of ε < 3 π.mm.mrad and ∆E ~ 1 eV [4, 23]. Under such conditions, it is possible to achieve the isobaric purification level and reach a mass resolution of 30000 and a transmission close to 100 % [4,23].…”

Section: Necessity Of Rfq Coolermentioning

confidence: 99%

Simulations of high intensity ion beam RFQ cooler for DESIR/SPIRAL 2: SHIRaC

et al. 2014

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ABSTRACT:The transport simulation of a high intensity ions beam with a radio-frequency cooler within the SPIRAL 2/GANIL High Intensity Radiofrequency Cooler, SHIRAC, installed at the SPIRAL 2/DESIR facility, is presented. Two simulation methods of cooling process in presence of space charge effect will be studied. The beam properties degradation by the coulomb repulsion and the buffer gas diffusion will be discussed. Finally, a comparison in term of transmission between simulated and experimental results for 133 Cs + ions beam of intensity going up to 1µA, will be outlined.

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Section: Necessity Of Rfq Coolermentioning

confidence: 99%

Simulations of high intensity ion beam RFQ cooler for DESIR/SPIRAL 2: SHIRaC

et al. 2014

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“…The final optical design [8] was validated in 2013 and consists of two 90 o magnetic dipoles (D) with 36 o entrance/exit angles, a set of matching quadrupoles (MQ), focusing quadrupoles (FQ), focusing sextupoles (FS) and a 48-pole multipole (M) in the symmetry plane of the beam line as shown in Fig. 1.…”

Section: Lattice and Elementsmentioning

confidence: 99%

“…Hence, we choose to fit with simulations for an optimal radius of the poles with a +150V hexapolar voltage applied on the multipole, leading to a 150Vequivalent remaining correction. For technical reason, and because the inner part of the dipoles are more sensitive to pole reshaping [8] we decided to rework only the inner poles of the dipoles (multipole side). Simulations with Zgoubi [12] give an optimal correction radius of 6.94 m for the inner poles of the dipoles.…”

Section: Development Programmentioning

confidence: 99%

Status on the DESIR High Resolution Separator Commissioning

Michaud,

Alfaurt,

Balana

et al. 2022

Preprint

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Many nuclear reactions used to create radioactive isotopes for nuclear research produce, in addition to the isotope of interest, many contaminants, which are often produced in much larger amounts than the isotope of interest. Many installations using the ISOL approach are therefore equipped with high-resolution mass separators to remove at least isotopes with a different mass number. In the present paper, we present the results of the commissioning of the DESIR HRS presently under development at LP2I Bordeaux (formerly CENBG). Optical aberrations are corrected up to 3rd order and a mass resolution of M/∆M of 25000 is reached with a transmission of about 70% for a 133 Cs + beam at 25 keV.

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“…A high resolution separator (HRS) enabling the suppression of undesirable isobaric ions from SPIRAL-2 beams will be installed in front of DESIR [8,9]. Nominal HRS working demands beams with geometric emittance ≤3π mm mrad and longitudinal energy spread ΔE ∼ 1 eV [8].…”

Section: Introductionmentioning

confidence: 99%

Development of a radio-frequency quadrupole cooler for high beam currents

Boussaid

Ban

Qúeḿener

et al. 2017

Phys. Rev. Accel. Beams

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International audienceThe SHIRaC prototype is a recently developed radio-frequency quadrupole (RFQ) beam cooler with an improved optics design to deliver the required beam quality to a high resolution separator (HRS). For an isobaric separation of isotopes, the HRS demands beams with emittance not exceeding 3π mm mrad and longitudinal energy spread ∼1 eV. Simulation studies showed a significant contribution of the buffer gas diffusion, space charge effect and mainly the rf fringe field to degrade the achieved beam quality at the RFQ exit. A miniature rf quadrupole (μRFQ) has been implemented at that exit to remove the degrading effects and provide beams with 1 eV of energy spread and around 1.75π mm mrad of emittance for 4 Pa gas pressure. This solution enables also to transmit more than 60% of the incoming ions for currents up to 1 μA. Detailed studies of this development are presented and discussed in this paper. Transport of beams from SHIRaC towards the HRS has been done with an electrostatic quadrupole triplet. Simulations and first experimental tests showed that more than 95% of ions can reach the HRS. Because SPIRAL-2 beams are of high current and very radioactive, the buffer gas will be highly contaminated. Safe maintenance of the SHIRaC beam line needs exceptional treatment of radioactive contaminants. For that, special vinyl sleep should be mounted on elements to be maintained. A detailed maintenance process will be presented

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SPIRAL2/DESIR high resolution mass separator

Cited by 18 publications

References 9 publications

Simulations of high intensity ion beam RFQ cooler for DESIR/SPIRAL 2: SHIRaC

Simulations of high intensity ion beam RFQ cooler for DESIR/SPIRAL 2: SHIRaC

Status on the DESIR High Resolution Separator Commissioning

Development of a radio-frequency quadrupole cooler for high beam currents

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