[Pansophy] C100 spare helium vessel items & headers bellows QC
Gary Cheng
cheng at jlab.org
Thu Apr 21 13:59:26 EDT 2022
Hi Mike,
Please change inventory on these items accordingly. They are purchased
by C100 refurb project funds and will be used as spares for C100R project.
Thanks,
Gary
On 4/21/2022 1:51 PM, Mike Dickey wrote:
>
> Hi All,
>
> These parts were received on the C100 project per the paperwork and
> are available for C100 Travelers. Please note that per the Traveler
> system, C100 & C100R are two distinct projects, therefore serial
> numbers do not cross over.
>
> Gary,
>
> I will have to get into the database to make the project change for
> the dropdowns. Should Inventory be changed as well?
>
> Thanks,
>
> Mike Dickey
>
> SRF Inventory Technician
>
> Jefferson Lab
> 12000 Jefferson Ave
> Newport News, VA 23606
> (757) 269-7755
>
> *From:*E. Anne McEwen <mcewen at jlab.org>
> *Sent:* Thursday, April 21, 2022 8:17 AM
> *To:* Gary Cheng <cheng at jlab.org>
> *Cc:* George DeKerlegand <georged at jlab.org>; Earl Mosby
> <mosby at jlab.org>; Mike Dickey <mdickey at jlab.org>
> *Subject:* RE: C100 spare helium vessel items & headers bellows QC
>
> Thanks Gary ! , we will put it on the list
>
> Best wishes
>
> Anne
>
> *From:*Gary Cheng <cheng at jlab.org <mailto:cheng at jlab.org>>
> *Sent:* Wednesday, April 20, 2022 3:06 PM
> *To:* E. Anne McEwen <mcewen at jlab.org <mailto:mcewen at jlab.org>>
> *Cc:* George DeKerlegand <georged at jlab.org <mailto:georged at jlab.org>>;
> Earl Mosby <mosby at jlab.org <mailto:mosby at jlab.org>>; Mike Dickey
> <mdickey at jlab.org <mailto:mdickey at jlab.org>>
> *Subject:* Re: C100 spare helium vessel items & headers bellows QC
>
> Hi Anne,
>
> The travelers for QC of the spare C100 parts are approved:
> C100R-CMA-HELV-INSP
> C100R-CMA-HERB-INSP
> C100R-CMA-HESB-INSP
>
> I noted Mike to populate the HESB and HERB dropdown lists.
>
> Thanks,
> Gary
>
> On 3/14/2022 9:15 AM, E. Anne McEwen wrote:
>
> Hi Gary
>
> We heard this morning that the first C100 Cavity tested this
> weekend in the VTA field emitted badly (even caused neutrons …. )
>
> So I am expecting they may want to use one or more of the spare
> C100 cavities (Tony confirmed they will ne hundting down any of
> the C100 spares they can find) , in which case somone is going to
> come looking for the HE Vessel items
>
> I had inventory bring the parts down a month ago (did not realize
> the traveler was not available) – so now given the performance of
> the C100 cavities , could you let us know when the traveler will
> be available –
>
> please let us know if any help is needed
>
> Thanks Anne
>
> *From:*Gary Cheng <cheng at jlab.org> <mailto:cheng at jlab.org>
> *Sent:* Thursday, March 3, 2022 3:55 PM
> *To:* E. Anne McEwen <mcewen at jlab.org> <mailto:mcewen at jlab.org>
> *Cc:* George DeKerlegand <georged at jlab.org>
> <mailto:georged at jlab.org>; Earl Mosby <mosby at jlab.org>
> <mailto:mosby at jlab.org>
> *Subject:* Re: C100 spare helium vessel items & headers bellows QC
>
> Hi Anne,
>
> It's on my list of things-to-do. I will find time to work on it
> and let you know when it is ready for use.
>
> Thanks,
> Gary
>
> On 3/3/2022 3:43 PM, E. Anne McEwen wrote:
>
> Hi Gary – I was wondering if you had a chance to look into the
> traveler for the HR Vessel for C100R ?
>
> If you need help please let us know – the parts are presently
> on our shelf so we can inspect them once we have the traveler
>
> Thanks Anne
>
> *From:*E. Anne McEwen
> *Sent:* Monday, February 21, 2022 2:13 PM
> *To:* Gary Cheng <cheng at jlab.org> <mailto:cheng at jlab.org>
> *Cc:* John Fischer <fischer at jlab.org>
> <mailto:fischer at jlab.org>; Tony Reilly <areilly at jlab.org>
> <mailto:areilly 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>
> *Subject:* RE: C100 spare helium vessel items & headers bellows QC
>
> Hi Gary
>
> I had the C100 HE Vessel parts for the two spare HE Vessels
> brought to the CMM room shelf last week by Inventory – just
> wanted to make sure they were not forgotten (assume they are
> not urgent )
>
> Could you let us know which traveler to use - if you are still
> in process of updating or converting it just let me know the
> expected Traveler acronym , so I can put it on my list
>
> Thanks Anne
>
> *From:*Gary Cheng <cheng at jlab.org <mailto:cheng at jlab.org>>
> *Sent:* Monday, January 31, 2022 12:06 PM
> *To:* Tony Reilly <areilly at jlab.org <mailto:areilly at jlab.org>>
> *Cc:* E. Anne McEwen <mcewen at jlab.org
> <mailto:mcewen at jlab.org>>; John Fischer <fischer at jlab.org
> <mailto:fischer at jlab.org>>
> *Subject:* Re: C100 spare helium vessel items & headers bellows QC
>
> Hi Tony,
>
> Ok I will convert the travelers.
>
> C100 has a magnetic shielding design goal of attenuating the
> earth magnetic field by 50 or 100 times. that is, assuming a
> .5 Gauss ambient field, the goal is to have 5~10 mG residual
> field on cavity surface. To achieve that, I primarily focused
> on the shield design.
>
> The C100 helium vessels were discovered to have remanent
> magnetic field later on after we start to receive them from
> vendor. Hence we started to measure the permeability. As you
> know, demagnetization started on the L2 cavities and CM
> components.
>
> To my knowledge, C100 refurb project does not require a change
> to C100 in regard to magnetic hygiene. To me, the permeability
> measurement is not informative on what remanent field a
> component has. I wouldn't suggest to continue doing that. So,
> if you agree, I will remove that step from inspection.
> Alternatively, I may adapt this step to ask for magnetic field
> measurement and demagnetize with the available demagnetizers
> to the best that we can do.
>
> Thanks,
> Gary
>
> On 1/31/2022 11:01 AM, Tony Reilly wrote:
>
> Hi Gary,
>
>
> The travelers need to be converted and the names updated
> please. As for magnetic hygiene, do we have a program or
> requirement for C100s? Are we demagnetizing any other
> parts? Does t make sense to demag spares now or when they
> are certain to go onto a cavity? Is there a specification
> for the permeability that the vendor needed to meet?
>
> Thanks,
>
> Tony
>
> ------------------------------------------------------------------------
>
> *From:*Gary Cheng <cheng at jlab.org> <mailto:cheng at jlab.org>
> *Sent:* Monday, January 31, 2022 10:56 AM
> *To:* Tony Reilly <areilly at jlab.org> <mailto:areilly at jlab.org>
> *Cc:* E. Anne McEwen <mcewen at jlab.org>
> <mailto:mcewen at jlab.org>; John Fischer <fischer at jlab.org>
> <mailto:fischer at jlab.org>
> *Subject:* Re: C100 spare helium vessel items & headers
> bellows QC
>
> Hi Tony,
>
> Do you think I should convert C100 helium vessel and
> cryogenic circuit inspection travelers to C100R versions,
> or, use the old ones as is? The old travelers still have
> John Hogan as project manager.
>
> The C100 helium vessel traveler has a step for magnetic
> permeability measurement, our original effort on magnetic
> hygiene control at the time. We can choose to i) keep this
> as is, ii) remove it, or iii) rewrite it to survey parts
> then demagnetize if necessary to align with LCLS-II
> magnetic hygiene control strategy.
>
> Thanks,
> Gary
>
> On 1/31/2022 8:39 AM, Tony Reilly wrote:
>
> C1010Q
>
> ------------------------------------------------------------------------
>
> *From:*Gary Cheng <cheng at jlab.org> <mailto:cheng at jlab.org>
> *Sent:* Friday, January 28, 2022 2:56 PM
> *To:* Tony Reilly <areilly at jlab.org>
> <mailto:areilly at jlab.org>
> *Cc:* E. Anne McEwen <mcewen at jlab.org>
> <mailto:mcewen at jlab.org>; John Fischer
> <fischer at jlab.org> <mailto:fischer at jlab.org>
> *Subject:* C100 spare helium vessel items & headers
> bellows QC
>
> Hi Tony,
>
> We just received a few kits of C100 helium vessel kits
> and helium header bellows, which will be used as
> spares for future C100 refurb. They need to go through
> incoming inspection like did for other C100 HV items
> and headers parts. They were purchased using code
> C1010F. Which code is appropriate for the inspection work?
>
> Thanks,
> Gary
>
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