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Carlos, you are right, I used log instead of ln. Thanks. Charles<br>
<div class="moz-forward-container">So it iwll not look so good <br>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject:
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<td>Re: [Gep5] leadglass recovery</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Thu, 08 May 2014 18:03:06 -0400</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
<td>Carlos Ayerbe-Gayoso <a class="moz-txt-link-rfc2396E"
href="mailto:gayoso@jlab.org"><gayoso@jlab.org></a></td>
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<td><a class="moz-txt-link-abbreviated"
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
<td>Charles F. Perdrisat <a class="moz-txt-link-rfc2396E"
href="mailto:perdrisa@jlab.org"><perdrisa@jlab.org></a></td>
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<div class="moz-cite-prefix">I'll repeat all calculus, but you
have a mistake in the first calculation<br>
<br>
ln 0.2 = -1.609<br>
<br>
I think you calculate ln 0.5 = -0.69 <br>
<br>
By the way, Bogdan caught me coming to the office and told me
the need to measure the Quantum Efficiency (I think he means
gain) of the PMTs after UV exposure, even the PMT are off during
the UV curing. I talked with Mark and next week we will set a
DAQ for this.<br>
<br>
Again, what's the deal asking for absorption and saying (Bogdan)
that using transmitivity is wrong? Well, I'll work with mine
and produce both. <br>
<br>
See you tomorrow<br>
<br>
Carlos<br>
<br>
El 5/8/2014 4:38 PM, Charles F. Perdrisat escribió:<br>
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<blockquote cite="mid:536BEB36.9040506@jlab.org" type="cite">Please
check it. It shows that for the assumed asymptotic, recovery and
initial transparencies, <1 hour is required if the time
constant is <3.5 hours. Assumed is 10% lost of gain in 10
hours of beam. Charles <br>
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