[Solid_baffle] talk slide

[Zhiwen Zhao]

The method I used is try to let the eDIS particles from same phi and 
different theta at vertex passing through baffle all the way.
The baffle shape at each plate is customized to the field map and plate 
location and it's often curved.
The opening (5 deg now) is determined by how positive particles leaks 
behave and it can be directly related to acceptance.
This is a straight forward way to design baffle and it works.

There are certainly other ways.
For example, one can try to preserve eDIS particles from different phi 
and different theta at vertex or try to preserve high x event directly.
I think it's less intuitive and harder to design.
But if someone can design it with a better baffle, I am all for it.

I am CCing this to solid_baffle list to keep the knowledge on record.

Thanks

Zhiwen

On 11/15/2013 10:58 AM, Seamus Riordan wrote:
> To first order, the only thing the field before the baffles does is move
> things in phi.  Because particles start out azimuthally symmetric, when
> they reach the first baffle they're still azimuthally symmetric and
> otherwise haven't changed much.  Basing the size of opening aperture on
> the field integral doesn't make sense.  If there was no field before the
> baffles, you would still design them the same way.
>
> Best,
> Seamus
>
> On 11/14/2013 11:55 PM, Zhiwen Zhao wrote:
>> Besides the slide, could you explain a little more about the baffle
>> and field integral you talked during my talk which I didn't understand.
>>
>> Thanks
>>
>> Zhiwen
>>