Verification of passive cooling techniques in the Super-FRS beam collimators

FAIRNESS 2016

Douma, C.A.^1 ; Gellanki, J.^1 ; Najafi, M.A.^1 ; Moeini, H.^1 ; Kalantar-Nayestanaki, N.^1 ; Rigollet, C.^1 ; Kuiken, O.J.^1 ; Lindemulder, M.F.^1 ; Smit, H.A.J.^1 ; Timersma, H.J.^1

KVI-CART, University of Groningen, Zernikelaan 25, Groningen

9747 AA, Netherlands^1

关键词: Experimental verification;    Fragment separators;    In-flight separator;    Passive cooling techniques;    Radioactive environment;    Simulation program;    Temperature reduction;    Thermal simulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/742/1/012031/pdf
DOI  :  10.1088/1742-6596/742/1/012031

来源: IOP

【 摘 要 】

The Super FRagment Separator (Super-FRS) at the FAIR facility will be the largest in-flight separator of heavy ions in the world. One of the essential steps in the separation procedure is to stop the unwanted ions with beam collimators. In one of the most common situations, the heavy ions are produced by a fission reaction of a primary238U-beam (1.5 GeV/u) hitting a12C target (2.5 g/cm2). In this situation, some of the produced ions are highly charged states of238U. These ions can reach the collimators with energies of up to 1.3 GeV/u and a power of up to 500 W. Under these conditions, a cooling system is required to prevent damage to the collimators and to the corresponding electronics. Due to the highly radioactive environment, both the collimators and the cooling system must be suitable for robot handling. Therefore, an active cooling system is undesirable because of the increased possibility of malfunctioning and other complications. By using thermal simulations (performed with NX9 of Siemens PLM), the possibility of passive cooling is explored. The validity of these simulations is tested by independent comparison with other simulation programs and by experimental verification. The experimental verification is still under analysis, but preliminary results indicate that the explored passive cooling option provides sufficient temperature reduction.