CERN Accelerating science

Published Articles
Title	Induced Activation in the Future Charge-Exchange Injection System of the PS Booster
Author(s)	Froeschl, R (CERN) ; Bertone, C (CERN) ; Borburgh, J (CERN) ; Burger, S (CERN) ; Dallocchio, A (CERN) ; Dobers, T (CERN) ; Garlasche, M (CERN) ; Hanke, K (CERN) ; Hansen, J (CERN) ; Hourican, M (CERN) ; Maglioni, C (CERN) ; Mikulec, B (CERN) ; Newborough, A (CERN) ; Noulibos, R (CERN) ; Riffaud, B (CERN) ; Weterings, W (CERN)
Publication	2015
Number of pages	6
In:	12th International Topical Meeting on Nuclear Applications of Accelerators, Washington, DC, USA, 10 - 13 Nov 2015, pp.77-82
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN PSB
Abstract	CERN’s Linac2 currently injects protons with a kinetic energy of 50 MeV into the PS Booster (PSB). Linac2 will be replaced by Linac4 which will inject H$^-$ ions with a kinetic energy of 160 MeV into the PSB. In order to enable the PSB for charge-exchange injection, it will be equipped with a new injection system. The proposed charge-exchange injection system will use carbon foils (one for each of the four PSB rings) to remove the electrons from the H$^-$ ions. The remaining protons will then be merged with the already circulating proton beam. Two percent of the injected beam are expected to be either incompletely stripped or unstripped, and will be sent to 4 internal $\rm{H}^0/H^-$ injection dumps (one per PSB ring). This paper focuses on the induced activation in the future injection region. The radiological impact of proposed material choices for the internal dumps has been assessed by establishing Work and Dose Plannings for the most important foreseen interventions. The expected ambient dose equivalent rates at the various work locations have been obtained by FLUKA Monte Carlo simulations. In addition, the activation of the carbon foils and the derived need of protection measures during foil exchanges are discussed.

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