Re: cathodes in 10cm diameter

[Tim Whitlatch <whitey@jlab.org>]

Hi Daniel,

Chuck is currently laying out the strips within the 10cm on 2.5mm centers with 1mm gap. He will layout the rest of the strips to a total of 192. This will put 40 strips on 2.5mm centers and 152 at 5.66mm centers. Both have 1mm gap.If the strips outside the 10mm are kept at 5mm centers, 20 more channels (1 more connector) would be required to cover the same area.All 3 kapton sections of the cathode would be different.

Cheers,

       Tim

Daniel S. Carman wrote:

Chuck,

We should talk about this in person.  There are two strategies.  One
is to increase the total number of strips beyond 192 and choose the
number of narrow strips to give one more connector, or to allow for
a very modest increase in strip width to conserve the numbers.  I
would ask that you consider both scenarios and let us know what we
are up against.

				Regards,

					Daniel


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* Dr. Daniel S. Carman                   e-mail : carman@jlab.org    *  
* Staff Scientist                        office : (757)-269-5586     *
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On Wed, 7 Mar 2007, Chuck Hutton wrote:

  

Dan,
In the Monday meeting you had mentioned that we needed to change the 
cathode strips to 2.5mm wide (in lieu of 4mm) inside a 10cm diameter 
circle. If this is done and we keep the channel count the same there 
will be a gap on each end of the cathode strip plane. If you would 
prefer to cover the plane completely like it is prior to the change, we 
will have to widen the strips outside the 10cm diameter accordingly or 
revise the channel count.

What is your feeling on this?

Thanks,
Chuck