[Pansophy] C75-RI-011 - End Group Serial Numbers ?

Thu Feb 11 17:29:18 EST 2021

Anne,
C75-RI-011 is in the tuning room last I saw. It was on a cart with a yellow hold tag on a flange cover.

If it helps, Gigi and I were able to see IA-008 scratched out on the FPC and CEBAF aim the HOMs.

- Ashley Mitchell
________________________________
From: E. Anne McEwen <mcewen at jlab.org>
Sent: Thursday, February 11, 2021 4:45:35 PM
To: Ashley Anderson Mitchell <ashleya at jlab.org>
Cc: Kurt Macha <macha at jlab.org>; Jacob Harris <jharris at jlab.org>; pansophy <pansophy at jlab.org>; George DeKerlegand <georged at jlab.org>; Earl Mosby <mosby at jlab.org>; Gianluigi Ciovati <gciovati at jlab.org>; Scott Williams <scott at jlab.org>
Subject: RE: C75-RI-011 - End Group Serial Numbers ?

Hello Ashely –

As of Tuesday according to the schedule,  it looks like you had C75-RI-011 in chemistry  , do you know where this cavity has gone and is it accessible ? After Feb 9th it disappears from the schedule so I am not sure where it is now

Gigi would like an investigation to find out what is the SN for the end group , so the next time it is available to us we would like to be able to see it again

Thanks Anne

From: E. Anne McEwen
Sent: Thursday, February 11, 2021 4:35 PM
To: Scott Williams <scott at jlab.org>
Cc: Kurt Macha <macha at jlab.org>; Jacob Harris <jharris at jlab.org>; pansophy <pansophy at jlab.org>; George DeKerlegand <georged at jlab.org>; Earl Mosby <mosby at jlab.org>; Gianluigi Ciovati <gciovati at jlab.org>; Ashley Anderson Mitchell <ashleya at JLAB.ORG>
Subject: FW: C75-RI-011 - End Group Serial Numbers ?

Hi Scott

I understand you have a list of the Serial numbers for the end groups that we originally cut off  – If you have this can you please send it to us

We need to try and figure out what the correct serial number was for this end group before it was scratched out (if possible )

Unfortunately it seems that  the serial numbers were not available in the drop downs original traveler when it was  first inspected back in November , subsequently it seems that the SN was scratched out on the part – so as a result we may have lost traceability on what end group ended up in this cavity

At this point we can only do our best to try and figure out by process of elimination which end group was used

I will come by in the morning – Thanks for your help

Anne

PS – for some reason this email was sent to my home address – for anyone responding please check that it’s going to my JLAB address mcewen at jlab.org<mailto:mcewen at jlab.org> so I will see any correspondence

From: Anne McEwen <anne.mcewen at outlook.com<mailto:anne.mcewen at outlook.com>>
Sent: Wednesday, February 10, 2021 6:21 PM
To: E. Anne McEwen <mcewen at jlab.org<mailto:mcewen at jlab.org>>
Subject: [EXTERNAL] FW: C75-RI-011

From: Gianluigi Ciovati <gciovati at jlab.org<mailto:gciovati at jlab.org>>
Sent: Wednesday, February 10, 2021 11:21 AM
To: Scott Williams <scott at jlab.org<mailto:scott at jlab.org>>; Anne McEwen <anne.mcewen at outlook.com<mailto:anne.mcewen at outlook.com>>; Jacob Harris <jharris at jlab.org<mailto:jharris at jlab.org>>; pansophy <pansophy at jlab.org<mailto:pansophy at jlab.org>>; George DeKerlegand <georged at jlab.org<mailto:georged at jlab.org>>; Earl Mosby <mosby at jlab.org<mailto:mosby at jlab.org>>
Cc: Kurt Macha <macha at jlab.org<mailto:macha at jlab.org>>; Tony Reilly <areilly at jlab.org<mailto:areilly at jlab.org>>
Subject: Fw: C75-RI-011

Hi all,

there seems to have been a chain of unfortunate events that has prevented us to associate the end-groups serial numbers to the proper C75 cavity SN:

  *   During inspection of the cavities from which the end-groups were going to be cut, it was agreed to serialize the end-groups with "EG-cavity SN" and this is how they were recorded in the travelers C20-CAV-INSP-FPCEG and C20-CAV-INSP-HOMEG
  *   When the cavities arrived from RI and were inspected by CMM group, those end-group SNs were not available in the drop-down menu for the traveler C75-CAV-INSP so the end-group SNs were left undefined in the cavity inspection traveler
  *   After the end-groups SNs were added to the drop-down menus, I was informed yesterday that some of the EG SNs were "scratched out" and not visible.
  *   This morning, I asked Ashley to check the thickness of the FPC flange on cavity C75-RI-011 and she sent me the pictures below which indeed show that the end-group SNs were scratched out and replaced by some other nomenclature

How did the end-groups got the SNs scratched out and re-serialized? How was it decided?

Thanks for your help and for a) suggesting a fix to the issue, b) fix the issue, c) suggest ways to prevent similar issue to occur again.

Best regards,

Gigi

________________________________

From: Ashley Anderson Mitchell <ashleya at jlab.org<mailto:ashleya at jlab.org>>
Sent: Wednesday, February 10, 2021 10:35 AM
To: Gianluigi Ciovati <gciovati at jlab.org<mailto:gciovati at jlab.org>>; Kurt Macha <macha at jlab.org<mailto:macha at jlab.org>>
Subject: Re: C75-RI-011

Gigi,

 I took thickness at the 4 corners so as not to scratch the flange sealing surface.  Measurements are in inches:  0.3005, 0.3490, 0.3270, 0.3280

As for the SN#s, some are scratched out.

 FPC says FLG#3 and MM#2 (and cavity number in two places)

HOM says MM 4

[Image.jpeg]

[Image.jpeg]

[Image.jpeg]

________________________________

From: Gianluigi Ciovati <gciovati at jlab.org<mailto:gciovati at jlab.org>>
Sent: Wednesday, February 10, 2021 9:19 AM
To: Ashley Anderson Mitchell <ashleya at jlab.org<mailto:ashleya at jlab.org>>; Kurt Macha <macha at jlab.org<mailto:macha at jlab.org>>
Subject: Re: C75-RI-011

Hi Ashley,

yes, thank you, I'll update the traveler within the hour. Could you please do a quick caliper check of the thickness of the FPC flange? There seems to be some issues with the end-groups SNs being scratched out?

Thanks,

Gigi

________________________________

From: Ashley Anderson Mitchell <ashleya at jlab.org<mailto:ashleya at jlab.org>>
Sent: Wednesday, February 10, 2021 8:58 AM
To: Gianluigi Ciovati <gciovati at jlab.org<mailto:gciovati at jlab.org>>; Kurt Macha <macha at jlab.org<mailto:macha at jlab.org>>
Subject: C75-RI-011

Gigi,

C75-RI-011‘a processing traveler ends with us at the USC and I don’t see it on the schedule in the future.

I think it should need tuning, CMM and/or lapping next?

Thanks,

- Ashley Mitchell
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/pansophy/attachments/20210211/558e70ca/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 623612 bytes
Desc: image001.jpg
URL: <https://mailman.jlab.org/pipermail/pansophy/attachments/20210211/558e70ca/attachment-0003.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 527934 bytes
Desc: image002.jpg
URL: <https://mailman.jlab.org/pipermail/pansophy/attachments/20210211/558e70ca/attachment-0004.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.jpg
Type: image/jpeg
Size: 379265 bytes
Desc: image003.jpg
URL: <https://mailman.jlab.org/pipermail/pansophy/attachments/20210211/558e70ca/attachment-0005.jpg>