<html><head><style> body {height: 100%; color:#000000; font-size:12pt; font-family:arial,helvetica,sans-serif;}</style></head><body><div>Hi George,<br></div><div><br data-mce-bogus="1"></div><div>I would rather agree with you because in this case we can have better control on RH<br data-mce-bogus="1"></div><div>in the detector. I also need to establish some control on the bubblers. We need also <br></div><div>to find how safely reach the top of the HTCC at any time.<br data-mce-bogus="1"></div><div>Thanks,<br data-mce-bogus="1"></div><div> Youri<br data-mce-bogus="1"></div><div><br></div><div>----- Original Message -----<br>From: George Jacobs <jacobsg@jlab.org><br>To: Youri Sharabian <youris@jlab.org><br>Cc: dsg-htcc@jlab.org, Bob Miller <rmiller@jlab.org>, Stepan Stepanyan <stepanya@jlab.org>, Volker Burkert <burkert@jlab.org><br>Sent: Wed, 25 Jan 2017 14:47:23 -0500 (EST)<br>Subject: Re: HTCC gas flow rate for KPP<br></div><div><br></div><br> OK, then it may be useful to increase the flow rate up to 13.0 slm,<br> or 1 volume exchange per day. This may be the flow rate we use<br> during future high luminosity runs.<br><div><br></div><br> George<br><div><br></div><div class="moz-cite-prefix">On 1/25/2017 1:14 PM, Youri Sharabian<br> wrote:<br></div><blockquote cite="mid:326076853.2048264.1485368091135.JavaMail.zimbra@jlab.org"><div><div>Hi George,<br></div><div><br></div><div>Yes, of course. We just started from 2 slm and gradually<br> are going up.</div><div>We want to see transition from low flow rate to the<br> recommended 6.5 slm.</div><div>Thank you.</div><div> Youri<br></div></div><div><br></div><div>----- Original Message -----<br><div><br></div>From: George Jacobs <a class="moz-txt-link-rfc2396E" href="mailto:jacobsg@jlab.org" target="_blank" data-mce-href="mailto:jacobsg@jlab.org"><jacobsg@jlab.org></a><br><div><br></div>To: <a class="moz-txt-link-abbreviated" href="mailto:dsg-htcc@jlab.org" target="_blank" data-mce-href="mailto:dsg-htcc@jlab.org">dsg-htcc@jlab.org</a>, Bob Miller <a class="moz-txt-link-rfc2396E" href="mailto:rmiller@jlab.org" target="_blank" data-mce-href="mailto:rmiller@jlab.org"><rmiller@jlab.org></a>,<br> Stepan Stepanyan <a class="moz-txt-link-rfc2396E" href="mailto:stepanya@jlab.org" target="_blank" data-mce-href="mailto:stepanya@jlab.org"><stepanya@jlab.org></a>, Volker Burkert<br> <a class="moz-txt-link-rfc2396E" href="mailto:burkert@jlab.org" target="_blank" data-mce-href="mailto:burkert@jlab.org"><burkert@jlab.org></a>, Youri Sharabian<br> <a class="moz-txt-link-rfc2396E" href="mailto:youris@jlab.org" target="_blank" data-mce-href="mailto:youris@jlab.org"><youris@jlab.org></a><br><div><br></div>Sent: Wed, 25 Jan 2017 10:08:41 -0500 (EST)<br><div><br></div>Subject: Re: HTCC gas flow rate for KPP<br></div><div><br></div><br><div><br></div>Hi Youri,<br><div><br></div><br><div><br></div>I see you have increased the flow rate to 5 slm. I will again<br><div><br></div>recommend that you increase this flow to a minimum value of 6.5<br> slm.<br><div><br></div><div><br></div><br><div><br></div>George<br><div><br></div><div class="moz-cite-prefix">On 1/23/2017 2:53 PM, George Jacobs<br><div><br></div>wrote:<br></div><blockquote cite="mid:10d358e7-d995-a3a6-4a92-0bc9edd6f222@jlab.org"><br><div><br></div><br> Hi Youri,<br><div><br></div><br><div><br></div>I recommend you increase your CO2 flow rate. The current rate of<br> 2<br><div><br></div>slm is too low. I recommend a flow of 6.5 slm until the KPP run <br><div><br></div>is completed.<br><div><br></div><br><div><br></div>The calculated flow rates for the HTCC are as follows;<br><div><br></div><br> Purge Flow - 20 slm - 1.5 volume exchanges per day- the detector<br><div><br></div>volume will be purged in 3.4 days<br><div><br></div><br> Running Flow - 6.5 slm - 0.5 volume exchanges per day <br><div><br></div><br> Reduced Flow - 3.25 slm - 0.25 volume exchanges per day<br><div><br></div><br><div><br></div>George<br><pre class="moz-signature">-- <br>George Jacobs<br>Jefferson Lab (TJNAF)<br>STE 12<br>12000 Jefferson Ave.<br>Newport News, VA 23606<br></pre><div><br></div><pre class="moz-signature">(office) 757-269-7115<br></pre><div><br></div><pre class="moz-signature">(cell) 757-876-0480<br></pre><div><br></div><pre class="moz-signature">(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org" target="_blank" data-mce-href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a><br data-mce-bogus="1"></pre><div><br></div><pre class="moz-signature">(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/%7Ejacobsg" target="_blank" data-mce-href="https://userweb.jlab.org/%7Ejacobsg">https://userweb.jlab.org/~jacobsg</a><br data-mce-bogus="1"></pre></blockquote><br><pre class="moz-signature">-- <br>George Jacobs<br>Jefferson Lab (TJNAF)<br>STE 12<br>12000 Jefferson Ave.<br>Newport News, VA 23606<br></pre><div><br></div><pre class="moz-signature">(office) 757-269-7115<br></pre><div><br></div><pre class="moz-signature">(cell) 757-876-0480<br></pre><div><br></div><pre class="moz-signature">(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org" target="_blank" data-mce-href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a><br data-mce-bogus="1"></pre><div><br></div><pre class="moz-signature">(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/%7Ejacobsg" target="_blank" data-mce-href="https://userweb.jlab.org/%7Ejacobsg">https://userweb.jlab.org/~jacobsg</a><br data-mce-bogus="1"></pre><div><br></div><div><br></div><div><br></div></blockquote><br><pre class="moz-signature">-- <br>George Jacobs<br>Jefferson Lab (TJNAF)<br>STE 12<br>12000 Jefferson Ave.<br>Newport News, VA 23606<br></pre><div><br></div><pre class="moz-signature">(office) 757-269-7115<br></pre><div><br></div><pre class="moz-signature">(cell) 757-876-0480<br></pre><div><br></div><pre class="moz-signature">(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org" target="_blank" data-mce-href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a><br></pre><div><br></div><pre class="moz-signature">(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/~jacobsg" target="_blank" data-mce-href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a><br data-mce-bogus="1"></pre><div><br></div><div><br></div><div><br></div></body></html>