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

Thu Feb 11 17:34:16 EST 2021

Drear Pansophy Team

We have an issue where it seems the SN that was used for the FPC of Cavity C75-RI-011 is not known

The SN was not available in the drop downs for the initial inspections done back in November, then it seems that on the part later the SN was scratch out  (see photos)

In Pansophy I am seeing now that  SNs are appearing in the drop down for the C20  HOM and FPC travelers -  Is it possible to get a list of the SNs that are available in these two  travelers , and can you also give a list of which ones have been used so far in cavities ?

I am hoping that by process of elimination we will be able to narrow down the possible serials numbers for the FPC on C75-RI-011 , then by looking very closely at C75-RI-011, once it is available again , we might be able to figure out the original SN

There is a more general problem where for CEBAF there are many old serial numbers - and it becomes difficult to tell by looking at the parts which are valid and which ones have been retired - The NBSN Cavities are a good example of this problem

This cavity will be going into the machine, and for a number of reasons it is important to figure out what might have been the SN for the FPC that was used

Thanks for your help

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
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