<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"><span></span></div><div dir="ltr"><meta http-equiv="content-type" content="text/html; charset=utf-8">Hello all, <div>Here are the news I just received from Bob Miller about his target test. <br>I agree with him that we shouldn’t risk changing material half way through the run and getting stuck again, losing precious beamtime. </div><div>Besides, RGA-RGK run until now on proton target, and RGA will run again right after RGB. I think this gives us plenty of data to evaluate neutron efficiency. </div><div>Let me know your comments. </div><div>Happy Christmas to everyone. </div><div>Silvia<br><br><div dir="ltr" id="AppleMailSignature">Sent from my iPhone</div><div dir="ltr"><br>Begin forwarded message:<br><br></div><blockquote type="cite"><div dir="ltr"><b>From:</b> Bob Miller <<a href="mailto:rmiller@jlab.org">rmiller@jlab.org</a>><br><b>Date:</b> 21 December 2018 at 19:58:09 CET<br><b>To:</b> Silvia Niccolai <<a href="mailto:niccolai@ipno.in2p3.fr">niccolai@ipno.in2p3.fr</a>><br><b>Cc:</b> Stepan Stepanyan <<a href="mailto:stepanya@jlab.org">stepanya@jlab.org</a>>, Volker Burkert <<a href="mailto:burkert@jlab.org">burkert@jlab.org</a>>, "Daniel S. Carman" <<a href="mailto:carman@jlab.org">carman@jlab.org</a>><br><b>Subject:</b> <b>Re: deuterium target plans</b><br><br></div></blockquote><blockquote type="cite"><div dir="ltr"><span>Hi Silvia,</span><br><span></span><br><span>I tried to operate the target with D2 yesterday and today and was not successful. The target software is stuck in one process and will not move forward.</span><br><span></span><br><span>Therefore we have to wait for support from Denis Bouziat at Saclay. He is the expert on the system and has diagnostic software that he can run. I am sure we can get the system operating in January. However, changing from D2 to H2 and back during an experiment is risky; the target is reliable when we get one configuration working (H2 for example), but whenever the system is shut down, or changes are made, we seem to have issues.</span><br><span></span><br><span>I have sent an email to Denis asking for support.</span><br><span></span><br><span>I will keep you informed of the progress when we return in January.</span><br><span></span><br><span>Regards,</span><br><span></span><br><span>Bob</span><br><span></span><br><span></span><br><br></div></blockquote></div></div></body></html>