LISTSERV mailing list manager LISTSERV 16.5

Help for HPS-SOFTWARE Archives


HPS-SOFTWARE Archives

HPS-SOFTWARE Archives


HPS-SOFTWARE@LISTSERV.SLAC.STANFORD.EDU


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Monospaced Font

LISTSERV Archives

LISTSERV Archives

HPS-SOFTWARE Home

HPS-SOFTWARE Home

HPS-SOFTWARE  November 2012

HPS-SOFTWARE November 2012

Subject:

Re: new detector geometry for proposal

From:

Maurik Holtrop <[log in to unmask]>

Reply-To:

Software for the Heavy Photon Search Experiment <[log in to unmask]>

Date:

Wed, 14 Nov 2012 23:12:14 -0500

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (94 lines)

Hi Sho,

The beam enters at 30.52 mrad, if we believe the trajectories of the mapped fields as particles propagate through them in G4.

When I made up the ecal geometry, the distance I was given was 51.93 inches from the target to the exit of the pair spectrometer vacuum chamber, so 1319mm. I just verified this and that is where I still have it in my simulation. That does not mean this is still the correct number though. I wouldn't worry about a mm though. I think it is more important that we verify the correct location of the front of the crystals. I am actually not 100% sure where they should be. We'll bring it up in the meeting tomorrow, and maybe Stepan or Takashi can chime in.

Best,
Maurik
 





On Nov 14, 2012, at 8:34 PM, Sho Uemura <[log in to unmask]> wrote:

> Okay, great, that clears up almost everything. A few last questions:
>
> * Beam enters at 30, 30.5, or 31 mrad? From Maurik's table it looks like 30.5, but I've heard all three of these numbers, so . . .
>
> * What is the distance between the target/lip of the magnet and the front face of the flange? Maurik's e-mail gives both 1319 and 1318 mm.
>
> * Where exactly is the electron flange in X?
>
> If there's an engineering drawing of the flange that would be nice, just so I can check it against the GDML of the flange.
>
> It looks like there was some discussion at the 10/18 software meeting
> about things that needed to be done to the geometry, and among these were
> ECal and ECal flange updates. Is there anything specific that was meant by that? Who was going to do that? Was anything actually done?
>
> On Wed, 14 Nov 2012, Stepan Stepanyan wrote:
>
>> Hello Sho,
>>
>> There were several email exchanges on the subject while I was trying to finish mine, so sorry for
>> repeats. I attached a file with geometry of ECal, vacuum chamber and the analyzing magnet, slides 2 and 3.
>>
>> As for your numbers, (a) I remember 31 mrad, (b) if target is at the lip of the analyzing magnet and
>> we take it as Z=0, than center of the analyzing magnet should be 18 inches away, 45.72 cm, (c) ECal
>> is not symmetric around the magnet and Z-axis, (d) see ECal flange and hole locations in the attached
>> file.
>>
>> I am also attaching another file showing positions at May run, that file has distance of crystals from the flange.
>>
>> I am sure you have seen these before, but just in case, it will help to finalize the geometry.
>>
>> Regards, Stepan
>>
>> On 11/13/12 9:35 PM, Sho Uemura wrote:
>>> Those are sections, not perspectives. They should be literally what you would see if you cut through the detector at the specified z.
>>> The flange appears to be positioned so the photon hole is somewhat to one side and angled out - if you look closely at the sections you can see that the photon hole is further from the center at z=150 than it is at z=137.
>>> I've attached two perspective views of the whole geometry.
>>> Relevant people, please comment on whether these statements are correct, with (0, 0, 0) being the beam spot on target and the Z-axis being parallel to the magnet bore:
>>> * This is the frame we want to use for SLIC/LCSim.
>>> * Beam enters at an angle of 30 mrad from Z, pointing into the positron side.
>>> * Center of the analyzing magnet is at z = 45.22 cm.
>>> * SVT is rotated 30 mrad into the positron side.
>>> * ECal is completely symmetric around the Z-axis (aside from the missing crystals). Front face is at z = 137 cm.
>>> * ECal flange has photon hole shifted 16 mm to the positron side at the front face of the flange (z = 135 cm), and 30 mm to the positron side at the rear face (z = 179 cm).
>>> * ECal flange has electron bulge at the size and shape seen on my sections.
>>> That's what I see in this geometry. If any of these statements are false, we need to fix the geometry to match.
>>> On Tue, 13 Nov 2012, Maurik Holtrop wrote:
>>>> Hello Sho,
>>>> I am a little confused about the pictures that you are drawing. The top one seems to have a vacuum "bulge" area that is too small. The "bulge" is supposed to fill up the gap of all the crystals that were removed. Is that some effect of the perspective?
>>>> The other issue is that the photon hole should be right through the center of the ECAL.
>>>> Best,
>>>> Maurik
>>>> Looking along the beam line, +x towards the left, +y towards the top.
>>>> On Nov 13, 2012, at 7:11 PM, Sho Uemura <[log in to unmask]> wrote:
>>>>> Okay, here's some sections of the flange at different values of Z; center of viewer is (0,0) I think - I have no idea what I'm doing but I managed to get SLIC to display the geometry.
>>>>> Looking at the Z=150 view, it looks like the photon hole is ~15 mm (somewhat more than one crystal width) from the center, where you'd want it to be at (150 cm)*(30 mrad) = 45 mm?
>>>> ########################################################################
>>>> Use REPLY-ALL to reply to list
>>>> To unsubscribe from the HPS-SOFTWARE list, click the following link:
>>>> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1
>>> ########################################################################
>>> Use REPLY-ALL to reply to list
>>> To unsubscribe from the HPS-SOFTWARE list, click the following link:
>>> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1
>>
>>
>
> ########################################################################
> Use REPLY-ALL to reply to list
>
> To unsubscribe from the HPS-SOFTWARE list, click the following link:
> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1

########################################################################
Use REPLY-ALL to reply to list

To unsubscribe from the HPS-SOFTWARE list, click the following link:
https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1

Top of Message | Previous Page | Permalink

Advanced Options


Options

Log In

Log In

Get Password

Get Password


Search Archives

Search Archives


Subscribe or Unsubscribe

Subscribe or Unsubscribe


Archives

February 2024
January 2024
December 2023
November 2023
October 2023
September 2023
August 2023
July 2023
June 2023
May 2023
April 2023
March 2023
February 2023
January 2023
December 2022
November 2022
October 2022
September 2022
August 2022
June 2022
April 2022
March 2022
February 2022
January 2022
December 2021
November 2021
October 2021
September 2021
August 2021
July 2021
June 2021
May 2021
April 2021
March 2021
February 2021
January 2021
December 2020
November 2020
October 2020
September 2020
August 2020
July 2020
June 2020
May 2020
April 2020
March 2020
February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011

ATOM RSS1 RSS2



LISTSERV.SLAC.STANFORD.EDU

Secured by F-Secure Anti-Virus CataList Email List Search Powered by the LISTSERV Email List Manager

Privacy Notice, Security Notice and Terms of Use