[Sbs_gems] FW: [EXTERNAL] Re: draft slides for Monday

Sun Oct 2 08:13:47 EDT 2022

Michael,

My apologies for my delayed response.

   - Please see the attached photos which show the GEn-RP GEMs and hardware
   in EEL.
   - Both polarimeter weldments/stacks are still currently in EEL.
   - Some of this will repeat and echo what Anu stated above but I just
   wanted tos tate what I know.
   - One polarimeter is fully assembled on its weldment in EEL (we have
   dubbed this one Pol-R). You can see this in the attached photo on the
   "left" side of the inline stack.
   - On the "right" side of the photo you can see an empty weldment. This
   is for the second polarimeter layer, Pol-L. Please forgive the naming
   convention and possible orientation confusion. These could easily just have
   their names and labels swapped as they are not necessarily locked in as
   Right or Left. The large white assembly frames for the Left and Right
   polarimeters are identical and symmetric.
   - The two UVa XY GEM layers for the to-be-assembled polarimeter are in
   EEL in various stages. One layer is fully assembled and is only missing
   some APV cards. I would need to confirm about the 2nd layer but I believe
   it would still need some hardware mounted, cabling, setup, etc. onto its
   layer. It also would have no APVs.
   - I circled the assembled Pol-L layer in one of the attached pictures.
   Unfortunately I do not have any photos of the layer on its own and in close
   up detail. I have provided a photo that shows a full UVa XY GEM layer for
   reference.
   - I also included the latest set of summary plots and hit maps taken in
   EEL. This will include information for the 6 Inline Layers and the 2
   Polarimeter R Layers.

Please let me know if I need to clarify anything or if I missed anything.

Best,

John

On Sun, Oct 2, 2022 at 1:56 AM Michael Kohl <kohlm at jlab.org> wrote:

> Dear David, Holly, all,
>
> thanks for all your input.
>
> Here I am sharing my draft slides for Monday. I still have time for some
> touch-ups if desired.
>
> Best regards,
>    Michael
>
>
> On Fri, 30 Sep 2022, John Boyd wrote:
>
> > I'll put something together for this and have it out later this
> afternoon.
> > I have some pictures but will need to find and organize them.
> >
> > -John
> >
> > On Fri, Sep 30, 2022 at 2:32 PM Anuruddha Rathnayake <
> adr4zs at virginia.edu>
> > wrote:
> >
> >> Hi Holly,
> >>
> >> I just scrolled through my photo gallery and unfortunately I could not
> >> find a picture of the last two layers that will go into the plarimeter
> left
> >> frame. Since I am restricted from the lab right now I cannot go in to
> take
> >> one. Not sure whether John has any with him.
> >>
> >> Looking at slide 2, I have a couple of comments,
> >> Pol-R is fully complete. It does not need any more APV cards. What needs
> >> more APV cards is the two layers that will go into the Pol-L frame. 1
> out
> >> of 2 layers for Pol-L is almost ready and we just have to put the APV
> cards
> >> that we took from it to replace bad  APVs in BB. Everything else is also
> >> ready for the last layer and we just need APV cards (88 of them) to
> >> assemble it.
> >>
> >> Best,
> >> Anu
> >>
> >> On Fri, Sep 30, 2022 at 1:18 PM Holly Szumila-Vance <hszumila at jlab.org>
> >> wrote:
> >>
> >>> Hi John, Anu,
> >>>
> >>>
> >>>
> >>> Here are the slides for Michael for Monday. Can you add the pictures
> that
> >>> Nilanga is referring to? I think he didn?t realize you weren?t on the
> cc.
> >>>
> >>>
> >>>
> >>> -Holly
> >>>
> >>>
> >>>
> >>> *From: *"Liyanage, Nilanga K (nl8n)" <nl8n at virginia.edu>
> >>> *Date: *Friday, September 30, 2022 at 1:14 PM
> >>> *To: *Michael Kohl <kohlm at jlab.org>, Holly Szumila-Vance <
> >>> hszumila at jlab.org>
> >>> *Cc: *"nilanga at jlab.org" <nilanga at jlab.org>
> >>> *Subject: *[EXTERNAL] Re: draft slides for Monday
> >>>
> >>>
> >>>
> >>> Hi Holly
> >>>
> >>>
> >>>
> >>> The slides are good; I am attaching the slides with a few revisions.
> >>>
> >>>
> >>>
> >>> Anuruddha or John may have some pictures of the final two layers on the
> >>> table, waiting for APV cards, and may be able to send.
> >>>
> >>>
> >>>
> >>> With the three power supplies from Evaristo, one from me and the
> HiVolta,
> >>> we will have 9 individual supplies.
> >>>
> >>>
> >>>
> >>> Michael:  The two new students are:
> >>>
> >>>
> >>>
> >>> Vimukthi Gamage
> >>>
> >>> Bhasitha Dharmasena
> >>>
> >>>
> >>>
> >>> Anuruddha, John: please send any pictures you may have of the last two
> >>> layers
> >>>
> >>>
> >>>
> >>> Best
> >>>
> >>>
> >>>
> >>> Nilanga
> >>>
> >>>
> >>> ------------------------------
> >>>
> >>> *From:* Michael Kohl <kohlm at jlab.org>
> >>> *Sent:* Friday, September 30, 2022 12:21 PM
> >>> *To:* Holly Szumila-Vance <hszumila at jlab.org>
> >>> *Cc:* nilanga at jlab.org <nilanga at jlab.org>
> >>> *Subject:* Re: draft slides for Monday
> >>>
> >>>
> >>>
> >>> Dear Holly, dear Nilanga,
> >>>
> >>> thank you very much. I am planning  to compose my slides tomorrow and
> >>> should share for quick feedback, so I can still make some changes on
> >>> Sunday.
> >>>
> >>> Any further material are still welcome.
> >>>
> >>> Nilanga, would you list the names of the two new students?
> >>>
> >>> Many thanks,
> >>> --Michael
> >>>
> >>>
> >>> On Fri, 30 Sep 2022, Holly Szumila-Vance wrote:
> >>>
> >>>>
> >>>> Hi Michael, Nilanga,
> >>>>
> >>>>
> >>>>
> >>>> Here are some draft slides for Monday. The first slide I think is
> fine,
> >>> but
> >>>> I need some details/input on the second slide as I think I missed the
> >>> last
> >>>> few meetings on the plans for the GEM frames we will use. Also we can
> >>> add
> >>>> any details here on the electronics. I think Nilanga can add these
> >>> details.
> >>>>
> >>>>
> >>>>
> >>>> I left the last 2 slides as backup slides for the information about
> the
> >>>> various divider configurations we are testing in BB during this
> >>> running. The
> >>>> plan is to upgrade to 2-path dividers since we can manage that with
> the
> >>>> power supplies after this fall run.
> >>>>
> >>>>
> >>>>
> >>>> -Holly
> >>>>
> >>>>
> >>>>
> >>>
> >>> +---------------------------------------------------------------------
> >>> Dr. Michael Kohl, Professor and Staff Research Scientist
> >>> Physics Department, Hampton University, Hampton, VA 23668
> >>> Jefferson Lab, C117, 12000 Jefferson Avenue, Newport News, VA 23606
> >>> Phone: +1-757-727-5153 (HU office), +1-757-256-5122 (Cell)
> >>> Email: kohlm at jlab.org
> >>> +---------------------------------------------------------------------
> >>>
> >>
> >
>
> +---------------------------------------------------------------------
> Dr. Michael Kohl, Professor and Staff Research Scientist
> Physics Department, Hampton University, Hampton, VA 23668
> Jefferson Lab, C117, 12000 Jefferson Avenue, Newport News, VA 23606
> Phone: +1-757-727-5153 (HU office), +1-757-256-5122 (Cell)
> Email: kohlm at jlab.org
> +---------------------------------------------------------------------
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