position of the quadrupole

[Alexander Somov <somov@jlab.org>]

Hello Yang,

What is exact position (size) of the quadrupole magnet
which you have used to generate a new magnetic field map ?

Thanks,
        Sascha




On Tue, 24 Feb 2009, Tim Whitlatch wrote:

> Hi Sascha,
>
> We will fix the downstream flange to be perpendicular to the electron beam.
>
> Where exactly should the quadrupole go in relation to the dipole?
>
> Cheers,
>
>      Tim
>
> Alexander Somov wrote:
>> Hello Tim,
>> 
>> I looked on the drawing:
>> 
>> -The positions of a dipole magnet and
>> fixed array counters (the first and last counters) seem
>> to be correct (+- few mm).
>> 
>> -the exit flange (end plate) of the vacuum chamber has to
>> be modified a little bit; as we have discusses the plate should go 
>> perpendicular to the electron beam (I will check with
>> James). The electron beam going to the dump seems to be at the
>> right position from the egde of the vacuum chamber.
>> 
>> -the quadrupole magnet has not been moved
>>  (in the MC it's placed downstream the beam) (?)
>> 
>> Cheers,
>>       Sascha
>> 
>> 
>> 
>> 
>> 
>> On Tue, 24 Feb 2009, Tim Whitlatch wrote:
>> 
>>> Hello all,
>>> 
>>> The updated (Feb 23, 2009) tagger interface drawings are now posted on the 
>>> wiki @
>>> 
>>> http://www.jlab.org/Hall-D/software/wiki/index.php/Tagged_Beam_Group_Engineering_Drawings 
>>> 
>>> sheets 1 and 2
>>> 
>>> Please have a good look at these. Pay close attention to the quad 
>>> location, distance to scintillators and downstream window. Please let me 
>>> know if these meet the current requirements. We will then release this 
>>> version so the machine group can use these positions.
>>> 
>>> Cheers,
>>>
>>>      Tim
>>> 
>>> 
>
>