E-rhic-ir-l mailing list

[Bill Christie <christie AT bnl.gov>]

Dear All,
    I forgot to attach the file for the presentation that Alexander 
gave at the last meeting. Please find it attached to this E-mail.
    Greetings,
        Bill

On 6/29/18 15:23, Bill Christie wrote:
> Dear All,
>     Below please find the minutes from our eRHIC IR Design meeting 
> that was held on Friday, 6/22/2018. Please note that our next meeting 
> will be on Friday July 6th, at 3 pm.
>     I note that there may be a number of people that are looking to 
> take days off next week due to the July 4th Holiday in the middle of 
> the week. I know we discussed this, but I wouldn't be adverse to 
> delaying our next meeting until the following week (e.g. Wednesday 
> July 11th) if most of the group wishes. Friday July 13th is the RHIC 
> annual Retreat, which is why if we move it I suggest something like 
> the 11th.
>     Greetings,
>         Bill
>
>   Minutes from the eRHIC IR Design meeting held on 6/22/18
>  --------------------------------------------------------------------------------- 
>
> * We started with a brief discussion of the agenda for the meeting.
>     - We note hat Alexei s not in town (World Cup) so we defer the 
> discussion on the impedance simulations.
>
> * Doug Holmes on effort to see how/if things fit in the existing RHIC 
> Halls and tunnels:
>     - Still gathering input
>     - Will get additional info. from Brett and Holger
>     - Try to have a "First look" figure for the next meeting in two weeks
>     - Discussion that the "MADX (?)" file doesn't have the transverse 
> magnet dimensions (i.e. shows cold mass dimensions, but not cryostats).
>     - Elke will pass info. to Doug on the magnet locations.
>     - Bill brings up the need to try and get to the point that the 
> necessary movement requirements for the sPHENIX detector platform can 
> be detailed, which would allow for the possible positioning of the 
> sPHENIX assembly for eRHIC operation.
>
> * Presentation by Alexander: File ayk-2018-06-22-bnl-ir-meeting.pptx
>     - Slide #2, Overall status
>         - p-side discription is in pretty good shape
>         - e-side description needs more work(?).
>     - Slide #3: Hadron going side
>         - Shows a momentum resolution plot
>     - Slide #4: Hadron going side (2)
>         - Spectator protons acceptance and angles
>         - no issues for recoil protons
>     - Slide #5: Electron going side
>         - Discusses how flanges/vacuum system components are input to 
> the simulations.
>     - Slide #6: Low Q**2 Tracker
>         - Shows location, and plot of low Q**2 distribution.
>             - Plot key: Black = everything, green = 
> aperture/acceptance, Blue = acceptance beyond 10 sigma
>
> * The agenda had a topic to view/discuss a new Figure from Bob
>        - Nothing sent for this meeting.
>
> * Brett walked us through his draft slides for the LHeC meeting the 
> following week in Paris.
>
> * Guillaume asks about the level of detail that Doug has in his model 
> for the Crab Cavities
>         - Answer is that most/all known details are in the model.
>     - This led to a discussion about a recent change to the electron 
> ring geometry. A figure on the chalk board showed this, apparently 
> very recent, change.
>     - This also led to a discussion about what coordinate system 
> everyone should use for these discussion, geometry files, etc.
>         - Guillaume indicated he'd send out a proposal for a 
> coordinate system for us to work in.
>         - Steve T. indicated he'd look for a link to the official 
> "RHIC" survey coordinate system.
>             - Steve did send the link. It is:
> https://public.bnl.gov/docs/cad/Documents/Accelerator%20Physics%20Coordinate%20Conventions.pdf 
>
>
> * Next Meeting, and Draft Agenda:
>     - Next meeting Friday July 6th, at 3 pm
>     - Draft Agenda:
>         - Alexander, an update on the simulations
>         - Doug Holmes on draft figure of how things fit in the tunnel 
> (if draft available by the meeting)
>         - Guillaume on a Coordinate system proposal.
>                         End of meeting.

Attachment: ayk-2018-06-22-bnl-ir-meeting.pptx
Description: application/vnd.openxmlformats-officedocument.presentationml.presentation