[Hbi-svt] Multiple scattering from copper

[Marc McMullen]

Ok, I will ask Amrit when is good for him next week.

Thanks
Marc

Maurizio Ungaro wrote:
> Hi Marc,
>
> let's meet next week, this week is really busy for me, is that ok?
>
> best,
> mauri
>
>
>
> On 06/09/2010 11:07 AM, Marc McMullen wrote:
>> Hi Maurizio,
>>
>> We need to schedule a meeting with you and Amrit to discuss simulations.
>> Are there any times particularly good or bad for you?
>>
>> Thanks
>> Marc
>>
>> Maurizio Ungaro wrote:
>>> Hi Marc,
>>>
>>> sorry I was at MENU conference all week. I'll get back to you on
>>> Monday if that's ok.
>>>
>>> best,
>>> mauri
>>>
>>>
>>> On Jun 4, 2010, at 11:52 AM, Marc McMullen wrote:
>>>
>>>> Hi All,
>>>>
>>>> Amrit has looked at Dave's suggested layout and would like to
>>>> consider the possible benefits of reducing region 2 to two sensors,
>>>> and even the possibility of having all regions using two sets of
>>>> sensors. Where this will limit the backward angle coverage, less
>>>> silicon should improve the signal to noise ratio as well as giving
>>>> the option of aligning the regions to reduce the effects of multiple
>>>> scattering. In addition to the advantages mechanically which Dave has
>>>> stated, by using reduced a length BST design it may be possible to
>>>> shift the position of the BST to accommodate greater backward angle
>>>> coverage (if need be, due to the needs of different experiments).
>>>> Perhaps this may be made possible by the ability to switch out a
>>>> length of pipe during a configuration change...but perhaps I am
>>>> getting ahead of myself, perhaps.
>>>>
>>>> I have requested Maurizio's help in to do some simulations on these
>>>> (at least 4 at this point) layouts. He has not replied yet, if anyone
>>>> knows if he is absent or on vacation please let me know. In any case
>>>> I am sure he will let me know something.
>>>>
>>>> Saptarshi is reviewing the two layouts we provided him earlier this
>>>> week, he should be able to tell us about interference with the
>>>> support tube and maybe if the support tube design can be modified to
>>>> accommodate this interference...or if it cannot, due to the
>>>> restrictions imposed by the geometry of the target(s).
>>>>
>>>>
>>>> Thanks
>>>> Marc
>>>>
>>>> David Kashy wrote:
>>>>> Hi All,
>>>>> I have looked at the two layouts (Rev 4 and Rev 5 of the BST Layout)
>>>>> Just using a ruler, it seems there is another option that should be
>>>>> simulated. If we take the two wafer design from Rev 4 inner layer
>>>>> and use it for R2 then we get the most compact BST. This gives the
>>>>> most rigid device since R1 and R2 are both short. R3 must be long,
>>>>> or we loose too much acceptance. It may be that we dont' quite get
>>>>> to 124 degrees, but I'm not sure if this is a requirement.
>>>>>
>>>>> So can we simulate the effect of having copper very close to the 124
>>>>> degree line as a 3rd case.
>>>>>
>>>>> Thanks
>>>>> Dave
>>>>>
>>>>>
>>>>> Marc McMullen wrote:
>>>>>> Hi Maurizio,
>>>>>>
>>>>>> I have a couple of questions concerning simulating the effects of
>>>>>> different cooling materials as it pertains to the multiple
>>>>>> scattering (M.S.) effect on the central detector components. We
>>>>>> would like to have a material which will both efficiently remove
>>>>>> the heat load produced by the ASICs of the SVT and while minimizing
>>>>>> M.S. effect. Amrit has pointed me in your direction. What would you
>>>>>> need to do this simulation, I assume the layout but perhaps a model
>>>>>> as well as the materials. We have been working with the Engineering
>>>>>> group and presently we have identified the thermal conducting
>>>>>> elements to be copper, but we are also interested in aluminum as
>>>>>> perhaps an alternative. In addition to what you would need to
>>>>>> perform this simulation, how much time would you need. We are also
>>>>>> working with Michael Merkin of MSU who is in the process developing
>>>>>> the base module of the SVT detector. So we are a bit short on time.
>>>>>> Let me know if theres anything I could do to help this along.
>>>>>>
>>>>>> Thanks
>>>>>> Marc McMullen
>>>>>>
>>>>>> Saptarshi Mandal wrote:
>>>>>>> Hi Marc,
>>>>>>>
>>>>>>> I spoke to Dave about the multiple scattering from the copper heat
>>>>>>> sink insert. He wanted to know if there was any kind of simulation
>>>>>>> done to study the effect of multiple scattering on MicroMegas/SVT
>>>>>>> due to the copper.
>>>>>>>
>>>>>>>
>>>>>> _______________________________________________
>>>>>> Hbi-svt mailing list
>>>>>> Hbi-svt at jlab.org
>>>>>> https://mailman.jlab.org/mailman/listinfo/hbi-svt
>>>>>>
>>>> <mcmullen.vcf>
>>>
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