sPHENIX tracking discussion

[John Haggerty <haggerty AT bnl.gov>]

Itaru,

No, certainly nobody would suggest that you spend any time evaluating 
MAPS detectors, but starting from the pixels, we need to know soon is 
how feasible *is* the reconfiguration of pixels?  Specifically, we need 
to be able to show:

1- A mechanical design that shows all the available ladders configured 
into a 2*pi detector

2- We need to know how the electronics will be configured to read it 
out--where will it go?  Are there problems with a new configuration of 
the readout electronics (longer cables leading to reduced performance, 
noise pickup, or crosstalk)?

3- Is the cabling feasible?  Do cables come out both ends?

4- How is the detector supported, inserted, and removed?

And, of course, last, but not least, how much does it all cost, and how 
long does it take?

Item #1, 3,  and 4 probably takes a mechanical designer; we may have to 
work with you to provide such a person, although you may be able to do 
it yourself, I'm not sure what the state of the mechanical model is.  I 
would think that #2 would be best addressed by bench tests on a spare 
ladder.  And when we know those things, then we can feed the real pixels 
back to Tony so we can see how it performs.

Of course, the outer layers need the same treatment, or more, since 
there are many new ideas and components, but it seems to me we need to 
develop more complete answers to these questions for the pixels straight 
away.

On 11/12/15 11:53 PM, Itaru Nakagawa wrote:
> Hi Tony,
>
>   OK.
>
> -itaru
>
> On 2015/11/12 23:49, Frawley, Anthony wrote:
> > Dear Itaru,
> >
> > We have a group (LANL) who has a strong interest in a MAPS inner
> > tracker, so this is of considerable interest to them.
> >
> > There is no suggestion that you guys should spend time studying a MAPS
> > tracker.
> >
> > Cheers
> > Tony
> >
> > ------------------------------------------------------------------------
> > *From:* Itaru Nakagawa [itaru AT bnl.gov]
> > *Sent:* Thursday, November 12, 2015 10:09 PM
> > *To:* Frawley, Anthony; sphenix-tracking-l AT lists.bnl.gov
> > *Subject:* Re: [Sphenix-tracking-l] sPHENIX tracking meeting next week
> >
> > Hi Tony,
> >
> >   I don't think we (RIKEN group) are the one who look into the MAPs
> > option by
> > spending our limited man power to do the study at the cost of slowing
> > down
> > the development of the silicon strip. However,  I am open to *listen*
> > to the
> > idea to make the outer tracker with MAPS from anybody who comes up
> > with the
> > 1) cost  and 2) schedule estimate in the level of reality of what we have
> > for the silicon strip solution.
> >
> > Regards,
> > -itaru
> >
> >
> >
> >
> > On 2015/11/12 15:25, Frawley, Anthony wrote:
> > > Hi All,
> > >
> > > First, a reminder that the next sPHENIX tracking meeting will be
> > > November 20 (not tomorrow!).
> > >
> > > For our meeting on November 20, we have arranged for Luciano Musa to
> > > call into the meeting at 9:00 am to give us a presentation about what
> > > would be involved for us to implement MAPS pixels in a tracker for
> > > PHENIX. This follows up on discussions with Leo Greiner in Santa Fe,
> > > where he talked about some cost comparisons of strips and MAPS pixels
> > > indicating that they would have similar cost.
> > >
> > > In addition to the discussion with Luciano, which should be quite
> > > interesting, I will also be soliciting presentations from experts on
> > > all four tracking options.
> > >
> > > Cheers
> > > Tony
> > >
> > >
> > >
> > > _______________________________________________
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> > > Sphenix-tracking-l AT lists.bnl.gov
> > > https://lists.bnl.gov/mailman/listinfo/sphenix-tracking-l
>
>
>
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--
John Haggerty
email: haggerty AT bnl.gov
cell: 631 741 3358