<html><body><div style="font-family: georgia,serif; font-size: 12pt; color: #000000"><div data-marker="__QUOTED_TEXT__"><div style="font-family: georgia,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: georgia,serif; font-size: 12pt; color: #000000;"><div><div style="font-family: georgia,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: georgia,serif; font-size: 12pt; color: #000000;"><div style="color: rgb(0, 0, 0);" data-mce-style="color: #000000;"><div style="color: rgb(0, 0, 0);" data-mce-style="color: #000000;"><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;">Hello,</p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"><br></p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;">To summarize the test and modifications performed on the Solenoid we can mention: </p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"><br></p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;">1. On 09/05/2018 it was performed a test to verify the timing between the PLC SOE and FastDAQ data/ FastDump switch opening. </p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> Solenoid ramped up to 100 A (two times) and fast dumped intentionally later to monitor the sequence of the events and the timestamps for the FastDAQ data. During this test QD#1 tripped first after the Fast_Dump button was pushed. </p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> As the outstanding of this test, it was found the following timing differences based in the SOE timestamps and FastDAQ data timestamps:</p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> Test #1:</p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> FastDAQ_QD1 - SOE _Fast Dump Relay was ~ 270.8 ms.</p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> FastDAQ_IDCCT1 - FastDAQ_QD1 was ~36.6 ms</p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> SOE_QD1 - FastDAQ_QD1 was ~ 34 ms.</p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> Test #2 : </p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> FastDAQ_QD1<span> </span>-<span> </span>SOE _Fast Dump Relay was ~ 284.2 ms.</p><p style="font-family: georgia, serif; font-size: 16px; color: rgb(0, 0, 0); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 16px; color: #000000; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; margin: 0px;"> FastDAQ_IDCCT1 - FastDAQ_QD1 was ~26.3 ms</p><p style="font-family: georgia, serif; font-size: 16px; color: rgb(0, 0, 0); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 16px; color: #000000; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; margin: 0px;"> SOE_QD1 - FastDAQ_QD1 was ~ 34.7 ms.</p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> </p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> For more details about this tests please refer: https://logbooks.jlab.org/entry/3593687 </p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"><br></p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;">2. Today 09/07/2018 it was performed the swapping of QD#1 and QD#2 units by two QD spares modified.<br></p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> Two spare Quench Detector units were modified by DC group with the aim to find more stability during the magnet operations. Modifications were applied to their hardware components as follow:</p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"> - Changed eight potentiometers for each channel (2 potentiometers per channel, one is used for gain and the other for balance). Pots changed from 12 turns to 25 turns.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> - Modified LED voltage source wiring. LEDs used as indicators for QD-Ch lower/upper and Sum.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> The following steps were followed for the swapping of the QDs:</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.1. Ramped down the Solenoid to 0 A.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.2. Connected a external power source to enable control power in the MPS.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.3. Took off and disconnected QD#1 and QD#2 units from the controls rack.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.4. Installed modified QDs, re-connected power cable, and signal/control cables.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.5. Found issues with the modified QD replaced as QD#2. (fixed later by Onish/DC group- changed Octo/component on QD#2 board)<br data-mce-bogus="1"></p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.6. Tuned QD#1 and QD#2. Set up gain/ balance pots and set voltage thresholds as previous ones (0.1 and 1.5 V)</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.7. Recorded values at which QD channels tripped.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.8. Set up delay time thresholds (200 and 999 ms)for each channel and make sure that all were recorded in the QDs memory.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.9 Tested QDs by tripping them when thresholds were exceeded.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"> 2.10. Removed control power for MPS and put it back to normal.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"><br data-mce-bogus="1"></p><p style="margin: 0px;" data-mce-style="margin: 0px;">After tunning was completed and returned all controls/instrumentation(VT panel) to normal operations the solenoid was ramped up to 250 A, it will be kept at this current over this weekend.</p><p style="margin: 0px;" data-mce-style="margin: 0px;">The next step will be ramp the Solenoid up to full current (2416 A) on Monday and test the modifications made in QDs.</p><p style="margin: 0px;" data-mce-style="margin: 0px;"><br data-mce-bogus="1"></p><p style="margin: 0px;" data-mce-style="margin: 0px;">Best Regard,</p><p style="margin: 0px;" data-mce-style="margin: 0px;">Pablo</p><p style="margin: 0px;" data-mce-style="margin: 0px;"><br data-mce-bogus="1"></p><p style="margin: 0px;" data-mce-style="margin: 0px;"><br data-mce-bogus="1"></p><p style="margin: 0px;" data-mce-style="margin: 0px;"><br data-mce-bogus="1"></p><p style="font-family: georgia, serif; font-size: 12pt; margin: 0px;" data-mce-style="font-family: georgia, serif; font-size: 12pt; margin: 0px;"><br><br></p></div></div></div></div></div><br></div></div></body></html>