sPHENIX tracking discussion

[Eric Mannel <mannel AT bnl.gov>]

Rachid-

To follow up on Ed's question, what is the inventory of working SPIRO boards and FEMs for the PIXEL system?

Also in looking at your slides it appears that you have added an additional bus extender to the end of the current extender.  All the digital I/O  with the the ALICE pixel chip are GTL (Gunning Transceiver Logic, which is  single ended) signals.  GTL was designed for what we now think of as moderate speed (10s of MHz)  and backplane (<1m distance) communications.  Has there been any discussion with an electrical engineer about what the limitations are on the distance of the bus extender and signal integrity for this type of signal over your proposed ?

Eric

On 04/15/2016 04:56 PM, EdwardOBrien wrote:

        HI Rachid,
          I have a couple of questions about the slides that you showed at the
    sPHENIX Tracker meeting today. Your slides show that when specific
    radii and ladder tilt angles are chosen for pixel layer P0 and P1
    you need 32 working ladders plus spares. My understanding is that
    the current PHENIX VTX has 30 ladders, of which ~ 40% have large
    dead areas.  What would be the plan to fully populate the sPHENIX
    vertex tracker with good working ladders?
     Also I am sure that in your last slide you meant that the first step
    of VTX integration into sPHENIX is done. A 3-D model of
     VTX ladders floating free in space as you showed is just the very
    start of Integration. But I'm sure that you know that. Thanks.


    Ed

    

On 4/14/2016 11:15 AM, Frawley, Anthony wrote:

HI All,

We will have an sPHENIX tracking meeting tomorrow, Friday April 15, at 9:00 am ET. The Indico page is:

https://indico.bnl.gov/conferenceDisplay.py?confId=200

The agenda is still clarifying.

In addition to reports on the detector options, I would like to have a general discussion about what is needed to meet the ALD's charge on detector cost. Mainly I would like to discuss what we will need to do to characterize the physics deliverd by tracking options, and how we will do it.

Cheers

Tony

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