Beams Document 309-v2

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Ground Water, Air-Borne and Soil Activation from the Operation of the MI-40 Beam Absorber During the FMI Era

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Submitted by:
Ruth A. Becker
Updated by:
Bruce C. Brown
Document Created:
12 Nov 1997, 00:00
Contents Revised:
26 Sep 2019, 10:17
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26 Sep 2019, 10:17
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01 Dec 1997, 00:00
12 Nov 1997, 00:00
Beam absorber built near the MI-40 straight section [1,2] will be used during the Fermilab Main Injector commissioning and operation. This
will also be used during the Recycler Ring commissioning and its study using proton beam. A proton beam of energy from 8 GeV to 150
GeV will be aborted towards the absorber and stopped in it. The interaction of these particles (and secondaries) with the absorber and its
surrounding soil induces radioactivity in them which will be of concern for operation of the Main Injector.

In this report we address the ground water, air-borne and soil radioactivations arising from the use of the absorber. The total beam
transported and aborted from the Recycler Ring towards the MI40 beam absorber is expected to be only a fraction of a precent of that
from the Main Injector. The precautionary steps established for the Main Injector operation to protect personnel from radiation should
provide enough coverage both for the MI and Recycler Ring. Hence, in the rest of the report we concentrate only on the Main Injector
operating conditions.

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