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Table of Radcon Configuration Studies Jul 18





Elton Smith
Jefferson Lab
elton@jlab.org
(757) 269-7625

---------- Forwarded message ----------
Date: Tue, 18 Jul 2000 15:55:44 -0400
From: Pavel Degtiarenko <pavel@jlab.org>
To: Elliott Wolin <wolin@jlab.org>, Elton Smith <elton@jlab.org>
Cc: Bob May <may@jlab.org>
Subject: Re: Last results

Hi Elliott,

The table  of up to date results follows:

target    wall    roof    lead    dumpline    boundary_dose_rate

none    10cm    10cm    yes    yes                0.33+/-0.11 urem/h
H30cm    10cm    10cm    yes    yes            1.60+/-0.17 urem/h
H30cm    10cm    10cm    no    yes            1.54+/-0.16 urem/h
H30cm    10cm    10cm    no    no            1.50+/-0.20 urem/h
H30cm    1cm    1cm    no    no            3.23+/-0.36 urem/h
H30cm    10cm    5cm    no    no            1.96+/-0.15 urem/h

Next I am going to play with the thickness of the retainer wall and its height to
try to reduce the dose rates in the vicinity of the hall below 50 urem/h.
I've got another question: is the 30 cm liq.H2 target the heaviest target that you
plan to use in the Hall D? How about liq.D2 - would it be shorter? Does anybody
envisage using of a nuclear target - and at what thickness?

Regards,
Pavel