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<p>Hi Xiangdong,</p>
<p>Amanda will be requesting a meeting with you so we can discuss
the test results.</p>
<p>We have a few initial comments regarding the test status report.</p>
<p>1) We're glad the noise results look promising (slides # 3-7). We
have some questions regarding the measurements that we can talk
about in the meeting.</p>
<p>2) Regarding the the Fast Resonance scanner program mentioned on
slide #8, DSG did not know about the existence or need for this
program before our meeting on Nov 8th. DSG is now working on the
update of this program.</p>
<p>3) On slide #9, the issue of synchronized field value logging is
mentioned. The addition of synchronized field value logging was
not requested as part of DSG's original HDice task list. To add
this new feature, a triggering source will be required. Triggering
can come from any hardware source that can accurately synchronize
the lock-in amp and field data acquisitions. <br>
</p>
<p>HDice requested in the original task list that a high accuracy
current shunt be found and integrated into the NMR program. The
purchase of the CT-Box was approved by HDice and it has been
integrated into the NMR program. However, that does not mitigate
the need for synchronized field value logging which is a new task.
<br>
</p>
<p>DSG has been investigating with CAENels the possibility of adding
a hardware triggering output to the CT-box. If this can be
implemented, it can be used to trigger the lock-in amplifier
satisfying the hardware need to synchronize the acquisitions.
However, extensive changes to the NMR program will needed to
implement synchronization. This NMR programming effort has not
started.</p>
<div class="moz-forward-container">4) The program issues with the
field scan mentioned on slides #10 - 11 is most likely due to the
lack of acquisition synchronization which is inherent in the
original NMR program before DSG worked on it.<br>
<br>
5) The timing issue shown on slide #12 is due to the requirement
in the NMR program that T(down) must equal T(up) and that T(bott)
must equal 1. This was inherent in the original NMR program before
DSG worked on it. The program modification to allow variable
values for T(down), T(up). and T(bott) was not requested.<br>
<br>
DSG will be happy to work on these additional tasks. We can talk
about this work during the meeting Amanda will be requesting. <br>
<br>
Regards,<br>
Peter<br>
<br>
<br>
<br>
<br>
-------- Forwarded Message --------
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject:
</th>
<td>[dsg-hdice] The status of testing newHDice NMR rack</td>
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<tr>
<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Mon, 5 Dec 2016 18:50:59 -0500 (EST)</td>
</tr>
<tr>
<th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
<td>Xiangdong Wei <a class="moz-txt-link-rfc2396E" href="mailto:xwei@jlab.org"><xwei@jlab.org></a></td>
</tr>
<tr>
<th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
<td>Amanda Hoebel <a class="moz-txt-link-rfc2396E" href="mailto:amandah@jlab.org"><amandah@jlab.org></a>,
<a class="moz-txt-link-abbreviated" href="mailto:dsg-hdice@jlab.org">dsg-hdice@jlab.org</a></td>
</tr>
</tbody>
</table>
<br>
<br>
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>Hi Amanda,<br>
</div>
<div><br data-mce-bogus="1">
</div>
<div>The attached pdf file is a status report of testing the
newly built HDice NMR rack. It took a few more days than I
said because I wanted to make sure that the information were
correct. Thanks for being patient.<br data-mce-bogus="1">
</div>
<div><br data-mce-bogus="1">
</div>
<div>Best regards,<br data-mce-bogus="1">
</div>
<div><br data-mce-bogus="1">
</div>
<div>Xiangdong<br data-mce-bogus="1">
</div>
<div><br>
</div>
<div data-marker="__SIG_PRE__">
<p><em><span style="FONT-FAMILY: courier
new,courier,monaco,monospace,sans-serif"><strong>Xiangdong
Wei</strong></span></em></p>
<p><em><span style="FONT-FAMILY: courier
new,courier,monaco,monospace,sans-serif"></span></em><span
style="FONT-FAMILY: courier
new,courier,monaco,monospace,sans-serif"><span
style="font-size: small;" data-mce-style="font-size:
small;" size="2">x-5266</span></span></p>
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