From: W.J. Llope (llope_at_physics.rice.edu)
Date: Fri Feb 21 2003 - 10:48:20 EST
i would prefer that we make any TOFr mult cabling additions during this
wednesday's access, when all of us will be together out there
and we can set this up in a calm and collected manner.
feel free to run whatever tests of the pVPD->trigger path
that you want. this is a crucial first step. if the
pVPD triggering can't be made to work then there's no sense
in adding all the tofr cabling... its a necessary pre-requisite
all i'm saying is let's take this step by step.. thanks!
bill
>Hi,
> We have restricted access for the next 8 hours!!
> Anything need to be done?
> Since the test Frank and I did last time indicates that
>the effect from second output of 706 is very small. I will
>try to put all the logics in and cables as well to test the
>timing and trigger rate?
>Thanks!
> Zhangbu
>
>-----Original Message-----
>From: W.J. Llope
>To: startof-hn_at_connery.star.bnl.gov
>Sent: 2/21/03 10:26 AM
>Subject: Fwd: Re: pVPD and TOFr
>
>just Cc:'ing startof w/ a message i sent to startrig earlier
>this morning...rgds...
>
>Delivered-To: llope_at_physics.rice.edu
>Date: Fri, 21 Feb 2003 09:40:01 -0500
>To: startrig-hn_at_www.star.bnl.gov
>From: "W.J. Llope" <llope_at_physics.rice.edu>
>X-HN-Forum: STAR Trigger discussions
>X-HN-Re: pVPD and TOFr (hank crawford)
>Subject: Re: pVPD and TOFr
>
>hi hank....
>
>>Hi Zhangbu -- We have a board called the "Minor driver board" that
>>allows us to
>>send 4 CDB monitor signals to the DAQ room. Les is using it for the FPD
>right
>>now, but when he is done with it we could use it for your new
>>signals. Bring out
>>a ZDCE1, pVPD, TOFr, and a Gate monitor and I think you have all you
>need.
>
>sounds good!
>
>> Any
>>chance to split the signal at the PMT and take an independent path to
>the
>>trigger?
>
>no - not really. we're already doing a balanced split out there
>in front of the pVPD FEE and any add'l splitting there would hurt.
>
>we could however take the analog signals out of the pVPD FEE,
>(which we are not using in this run's configuration) and bring
>those to the platform for discriminating and coincidencing.
>you could gain 30-40ns maybe.
>the timing resn of these signals will be awlful, no doubt, but
>if one is just counting the number of fired pVPD chs, and really
>needs to gain 30-40ns, then building 6 new cables and coming
>off the pVPD FEE analog outputs would be the way to go IMHO...
>
>btw no such shortcuts are possible w/ the TOFr signal timing, which will
>arrive at the trigger racks 10-20 ns later than typical pVPD signals
>(with the present pVPD cabling)
>
>regards,
> bill
>
>>You could save many ns in cable perhaps. We believe it is best if we
>>can get the signals into the data stream with the ZDC. We could even
>>consider a
>>separate CDB and a separate DSM if it came to that. -- Thanks -- Hank
>>
>>--
>>Hank Crawford, Univ. of California, Berkeley, Space Sciences Laboratory
>>Phone (LBL) : 510-486-6962 FAX: 510-486-7379 Phone (BNL)
>:631-344-4942
>>
>>
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>>Visit this STAR HyperNews message (to reply or unsubscribe) at:
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>
>--
>
> W.J. Llope, Ph.D.İİİİİİİİİİİİİİİİİİİİİ Res. Assoc. Professor
> T.W. Bonner Nuclear Laboratoryİİİİİİİİ phone: 713-348-4741
> Rice University, MS-315İİİİİİİİİİİİİİİ fax: 713-348-5215
> 6100 S. Main St.İİİİİİİİİİİİİİİİİİ
> Houston, TX 77005-1892İİİİİİİİİİİİ
> e-mail: llope_at_physics.rice.edu
> WWW home:İİ http://wjllope.rice.edu/default.html
>
>--
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>
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>Visit this STAR HyperNews message (to reply or unsubscribe) at:
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>--
>
> W.J. Llope, Ph.D. Res. Assoc. Professor
> T.W. Bonner Nuclear Laboratory phone: 713-348-4741
> Rice University, MS-315 fax: 713-348-5215
> 6100 S. Main St.
> Houston, TX 77005-1892
> e-mail: llope_at_physics.rice.edu
> WWW home: http://wjllope.rice.edu/default.html
>
>--
>
>
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>Visit this STAR HyperNews message (to reply or unsubscribe) at:
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--W.J. Llope, Ph.D. Res. Assoc. Professor T.W. Bonner Nuclear Laboratory phone: 713-348-4741 Rice University, MS-315 fax: 713-348-5215 6100 S. Main St. Houston, TX 77005-1892 e-mail: llope_at_physics.rice.edu WWW home: http://wjllope.rice.edu/default.html
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