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Re: [E-rhic-ir-l] frequency change request

From: "Luo, Yun" <yluo AT bnl.gov>
To: "Wu, Qiong" <qiowu AT bnl.gov>, "Willeke, Ferdinand" <willeke AT bnl.gov>, "Hatton, Diane" <dhatton AT bnl.gov>, "Blaskiewicz, Michael M" <blaskiewicz AT bnl.gov>, "Ranjbar, Vahid" <vranjbar AT bnl.gov>, "Montag, Christoph" <montagc AT bnl.gov>, "Ptitsyn, Vadim" <vadimp AT bnl.gov>, "McIntyre, Gary T" <mac AT bnl.gov>, "Tuozzolo, Joseph E" <tuozzolo AT bnl.gov>, "Folz, Charles" <cfolz AT bnl.gov>, "Fischer, Wolfram" <wfischer AT bnl.gov>, "Wang, Erdong" <wange AT bnl.gov>, "Skaritka, John" <skaritka AT bnl.gov>, "Huang, Haixin" <huanghai AT bnl.gov>, "e-rhic-ir-l AT lists.bnl.gov" <E-rhic-ir-l AT lists.bnl.gov>
Cc: "Smith, Kevin S" <ksmith AT bnl.gov>
Subject: Re: [E-rhic-ir-l] frequency change request
Date: Thu, 16 May 2019 18:37:16 +0000

Qiong and all others,

I checked the bunch filling pattern and collision patterns with proposed h=315.

There is no issue to collide beams at STAR and PHENIX simultaneously. The luminosity will be almost equally shared by both detectors.

And both 197MHz and 394MHz can be used for crab cavity frequency in the electron ring.

For details, check attached slices. And welcome others to double check the calculations.

Yun

On 5/3/19 4:44 PM, Wu, Qiong wrote:

Dear all,

Please find the DCC proposal for the frequency change (harmonic 360 changed to 315) along with the latest parameter table from Vadim (see the frequency in Kevin’s proposal).

This change is not only limited in the frequency of the RF cavities, but also the fill pattern and charge per bunch and beyond. Please take a serious consideration of this through the area you’re in charge of for anything that might be impacted.

Any alalysis towards validating this change should be documented into a memo, and we’re open to any format you want to submit as supplement material for this request.

Please send these to anyone that should be involved.

Please refer to Kevin Smith (cc’ed in this email) or me for any questions you have.

Have a nice weekend,

Qiong

Attachment: 2019May15_h315_FillingPattern_yluo.pdf
Description: 2019May15_h315_FillingPattern_yluo.pdf

[E-rhic-ir-l] frequency change request, Wu, Qiong, 05/03/2019
- Re: [E-rhic-ir-l] frequency change request, Aschenauer Elke-Caroline, 05/04/2019
  - Re: [E-rhic-ir-l] frequency change request, Montag, Christoph, 05/04/2019
- Re: [E-rhic-ir-l] frequency change request, Huang, Haixin, 05/10/2019
- Re: [E-rhic-ir-l] frequency change request, Luo, Yun, 05/16/2019
  - [E-rhic-ir-l] Recall: frequency change request, Luo, Yun, 05/16/2019
    - Re: [E-rhic-ir-l] Recall: frequency change request, Wu, Qiong, 05/16/2019
    - Re: [E-rhic-ir-l] Recall: frequency change request, Luo, Yun, 05/16/2019
- <Possible follow-up(s)>
- Re: [E-rhic-ir-l] frequency change request, Wang, Erdong, 05/16/2019