Re: Hodoscope coordinates

[Richard Jones <richard.t.jones@uconn.edu>]

Franz,

I just checked the focal plane limits reported by Tim and indeed the 
rays for 315 MeV electrons (center of counter 190) and 8985 MeV (center 
of counter 1) do pass through his two endpoints.  With this information, 
are you able to provide me with the updated positions and rotation 
angles of all of the fixed-array counters?  I would like to update the 
simulation geometry, because right now the counters are too spread out.

Richard J.

Franz Klein wrote:
>
> I am glad that this is settled!
> Franz
>
> ps. Sorry for calling in 30 minutes late! On Thu, 13 Nov 2008, Tim 
> Whitlatch wrote:
>
>> Hi Franz,
>>
>> We have located the geometric center of the upstream and downstream 
>> counters (scintillators) at these locations. This is in relation to 
>> the center of the radiator. The X coordinate is horizontal in 
>> reference to the photon beam (+ to the left looking downstream), Y is 
>> vertical (+ up) and Z along photon beam (+ going downstream).
>>
>> Thanks,
>>
>>      Tim
>>
>> Franz Klein wrote:
>>>
>>> the coordinates for all counters are actually on the wiki (and in 
>>> the report I wrote over the weekend - DocDB 1154):
>>> Counter 1: x=-684.16mm, z=3875.78mm
>>> Counter 190: x=-2381.92mm z=13793.92mm
>>>
>>> I hope it fits: I used Yang's tosca file (which had a left-handed 
>>> coordinate system, and transformed it into the one Richard is using 
>>> in his simulation programs: he told me that is the one that is 
>>> generaly used...)
>>>
>>> Good luck
>>>
>>> Franz
>>>
>>> On Wed, 29 Oct 2008, Tim Whitlatch wrote:
>>>
>>>> Hi Franz,
>>>>
>>>> James has brought the step file into IDEAS. It looks pretty good. 
>>>> Thanks. Can you give an x and z coordinate for the first and last 
>>>> scintillators on the hodoscope?
>>>>
>>>> Thanks,
>>>>
>>>>      Tim
>>>>> ----------------
>>>>
>>>
>>> ===============================================================
>>>                   Franz J. Klein, Associate Professor
>>>                   CUA, Department of Physics
>>>                   Washington, DC 20064
>>>   office: Hannan Hall 206          phone: 202-319-6190
>>>   or: Jefferson Lab,CC F-243       phone: 757-269-6671
>>> ---------------------------------------------------------------
>>> ------------------------------------------------------------------------ 
>>>
>>>
>>> begin:vcard
>>> fn:Timothy Whitlatch, PE
>>> n:Whitlatch;Timothy
>>> tel;work:757-269-5087
>>> tel;fax:757-269-5279
>>> version:2.1
>>> end:vcard
>>>
>>>
>
> ===============================================================
>                   Franz J. Klein, Associate Professor
>                   CUA, Department of Physics
>                   Washington, DC 20064
>   office: Hannan Hall 206          phone: 202-319-6190
>   or: Jefferson Lab,CC F-243       phone: 757-269-6671
> ---------------------------------------------------------------