[Halld-cpp] CPP trigger disucssion

zihlmann zihlmann at jlab.org
Mon Nov 30 08:07:52 EST 2020 

Hi Ilya,
for you document I get the impression that we are working with 8 bits 
per plane. However
in the last meeting we were talking about 16 bits. So I am guessing that 
there are some
additional steps happening that are not mentioned in the document?

the CTP document
https://halldweb.jlab.org/DocDB/0010/001019/002/D00000-16-08-S001-CTP_Module.pdf
states that each F250 has 8 two line differential connections to the CTP 
that can
be used for either HB or TS mode (for TOF trigger). However it does not 
outline
in detail how this is achieved. I sent an email to Fernando asking him 
for detailed
documentation about this is implemented on the Xilinks FPGAs of the CTP 
board.

To clarify for all:
each F250 will communicate a hit pattern to the CTP through the 8 
differential connections
to the CTP. Why this should be able to handle 16 bits (as mentioned in 
the document) is not
clear to me. Based on these hit patterns from the F250s the CTP will 
create a global
hit pattern for both TOF planes. Based on this I still claim that a 
single F250 ADC can
have only signals from either TOP, BOTTOM, NORTH or SOUTH PMTs in it but 
never a mixture
of them.

cheers,
Beni

On 11/29/20 10:42 PM, Ilya Larin wrote:
>
> Hello everyone,
>
> I am attaching the draft of a shirt specification sheet
> for the CPP trigger. Please make comments and send suggestions.
> I have also submitted CPP trigger rates note (GlueX doc id 4796).
>
>  Thank you,
> Ilya
>
>
> ------------------------------------------------------------------------
> *От:* Elton Smith <elton at jlab.org>
> *Отправлено:* 24 ноября 2020 г. 15:05
> *Кому:* Alexander Somov <somov at jlab.org>
> *Копия:* Elton Smith <elton at jlab.org>; Ilya Larin <ilarin at jlab.org>; 
> halld-cpp at jlab.org <halld-cpp at jlab.org>; Rory Miskimen 
> <miskimen at umass.edu>
> *Тема:* Re: [Halld-cpp] FWD, CPP trigger disucssion
> Hi Sasha,
>
> Ok. We will talk about preparing a short specification sheet based on 
> his longer writeup and let you take a look at it.
>
> Thanks, Elton.
> ------------------------------------
> Elton Smith
> Jefferson Lab MS 12H3
> 12000 Jefferson Ave STE 4
> Newport News, VA 23606
> (757)269-7625
>
>> On Nov 24, 2020, at 2:55 PM, Alexander Somov <somov at jlab.org 
>> <mailto:somov at jlab.org>> wrote:
>>
>> Hi Elton,
>>
>> This is a good news that we may be able to use the old firmware though
>> some tweaking will be required anyway because of the different  TOF 
>> paddle
>> layout ( if you decide to use TOF). The easiest would be if Ilya can 
>> prepare a short
>> write up with specifications.
>>
>> Cheers,
>>              Sasha
>>
>>
>>
>> ------------------------------------------------------------------------
>> *From:*Elton Smith <elton at jlab.org <mailto:elton at jlab.org>>
>> *Sent:*Tuesday, November 24, 2020 2:37 PM
>> *To:*Alexander Somov <somov at jlab.org <mailto:somov at jlab.org>>
>> *Cc:*Elton Smith <elton at jlab.org <mailto:elton at jlab.org>>; Ilya Larin 
>> <ilarin at jlab.org <mailto:ilarin at jlab.org>>;halld-cpp at jlab.org 
>> <mailto:halld-cpp at jlab.org><halld-cpp at jlab.org 
>> <mailto:halld-cpp at jlab.org>>; Rory Miskimen <miskimen at umass.edu 
>> <mailto:miskimen at umass.edu>>
>> *Subject:*Re: [Halld-cpp] FWD, CPP trigger disucssion
>> Hi Sasha,
>>
>> The main issue that we want to determine is whether any firmware 
>> needs to be changed, because that could have substantial requirements 
>> on manpower and could become a scheduling problem. However, Ilya has 
>> come up with a strategy for the TOF trigger and he does not believe 
>> that any new firmware is required: all changes could be done by 
>> changing configuration files. We wanted to check this with you and 
>> verify that no new firmware is required. Ilya could go over his 
>> scheme with you (he also has a writeup) for comments. If no new 
>> firmware is required, then there is no urgency to develop a detailed 
>> plan for the Readiness Review. It should not take much time for you 
>> to confirm whether new firmware is needed or not. Perhaps that could 
>> be done next week?
>>
>> Thanks, Elton.
>>
>>
>>
>>
>> ------------------------------------
>> Elton Smith
>> Jefferson Lab MS 12H3
>> 12000 Jefferson Ave STE 4
>> Newport News, VA 23606
>> (757)269-7625
>>
>>> On Nov 24, 2020, at 1:59 PM, Alexander Somov <somov at jlab.org 
>>> <mailto:somov at jlab.org>> wrote:
>>>
>>> Hi Elton,
>>>
>>> December will be very busy, there are only a few weeks left before 
>>> holidays,
>>> and I am planing for some vacations. Let's come back to the meeting 
>>> sometime
>>> in January.
>>>
>>> Actually, I don't believe that you need me at this stage. You have 
>>> data you can
>>> look at and decide on the algorithm (if you decide to use something 
>>> different
>>> from GlueX), which will work for you. I cannot help with that 
>>> without looking on
>>> data myself.
>>>
>>> Cheers,
>>>             Sasha
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>> *From:*Elton Smith <elton at jlab.org <mailto:elton at jlab.org>>
>>> *Sent:*Tuesday, November 24, 2020 11:40 AM
>>> *To:*Alexander Somov <somov at jlab.org <mailto:somov at jlab.org>>
>>> *Cc:*Elton Smith <elton at jlab.org <mailto:elton at jlab.org>>; Ilya 
>>> Larin <ilarin at jlab.org <mailto:ilarin at jlab.org>>;halld-cpp at jlab.org 
>>> <mailto:halld-cpp at jlab.org><halld-cpp at jlab.org 
>>> <mailto:halld-cpp at jlab.org>>; Rory Miskimen <miskimen at umass.edu 
>>> <mailto:miskimen at umass.edu>>
>>> *Subject:*Re: [Halld-cpp] FWD, CPP trigger disucssion
>>> HI Sasha,
>>>
>>> Indeed, tomorrow is close to the holiday.
>>>
>>> Could you confirm your attendance for next week Wed Dec 2 at 9:00 
>>> am? If Wed is not convenient for you, perhaps you can propose a 
>>> couple of alternatives so that we can arrange to meet then. We need 
>>> to get clarification on some trigger issues before our Readiness Review.
>>>
>>> Thanks, Elton.
>>> ------------------------------------
>>> Elton Smith
>>> Jefferson Lab MS 12H3
>>> 12000 Jefferson Ave STE 4
>>> Newport News, VA 23606
>>> (757)269-7625
>>>
>>>> On Nov 24, 2020, at 11:16 AM, Alexander Somov <somov at jlab.org 
>>>> <mailto:somov at jlab.org>> wrote:
>>>>
>>>> Hi Ilya,
>>>>
>>>> I will likely be off tomorrow (it's a holiday week).
>>>>
>>>> Cheers,
>>>>              Sasha
>>>>
>>>> ------------------------------------------------------------------------
>>>> *From:*Ilya Larin <ilarin at jlab.org <mailto:ilarin at jlab.org>>
>>>> *Sent:*Friday, November 20, 2020 12:52 PM
>>>> *To:*Alexander Somov <somov at jlab.org 
>>>> <mailto:somov at jlab.org>>;halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org><halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org>>
>>>> *Subject:*RE: FWD, CPP trigger disucssion
>>>>
>>>>  Hi Sasha,
>>>>
>>>> we would like to confirm if you can join CPP meeting Wednesday 25th 
>>>> at 9am,
>>>> to clarify the trigger organization options.
>>>>
>>>>  Thank you.
>>>> Ilya
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>> *От:*Alexander Somov <somov at jlab.org <mailto:somov at jlab.org>>
>>>> *Отправлено:*18 ноября 2020 г. 12:10
>>>> *Кому:*Ilya Larin <ilarin at jlab.org 
>>>> <mailto:ilarin at jlab.org>>;halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org><halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org>>
>>>> *Тема:*Re: FWD, CPP trigger disucssion
>>>> I am sorry Iliya,
>>>>
>>>> The meeting with Sean and other guys was long today
>>>> (we were discussing preparation for the SRC/CT experiment).
>>>>
>>>> If you have a meeting next week, I'll try to join.
>>>>
>>>> Cheers,
>>>>               Sasha
>>>>
>>>> ------------------------------------------------------------------------
>>>> *From:*Ilya Larin <ilarin at jlab.org <mailto:ilarin at jlab.org>>
>>>> *Sent:*Wednesday, November 18, 2020 9:12 AM
>>>> *To:*Alexander Somov <somov at jlab.org 
>>>> <mailto:somov at jlab.org>>;halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org><halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org>>
>>>> *Subject:*RE: FWD, CPP trigger disucssion
>>>> Hi Sasha,
>>>>
>>>> We will wait for you to join us today till 10am.
>>>>
>>>> The meeting link is:https://bluejeans.com/949429419
>>>>
>>>> Thanks,
>>>> Ilya
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>> *От:*Alexander Somov <somov at jlab.org <mailto:somov at jlab.org>>
>>>> *Отправлено:*17 ноября 2020 г. 18:03
>>>> *Кому:*Ilya Larin <ilarin at jlab.org 
>>>> <mailto:ilarin at jlab.org>>;halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org><halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org>>
>>>> *Тема:*Re: FWD, CPP trigger disucssion
>>>> Hi Iliya,
>>>>
>>>> I have a meeting with Sean at 9 am tomorrow (the meeting should not 
>>>> last more
>>>> than an hour). I can try to connect right after the meeting or we 
>>>> can meet during
>>>> next week.
>>>>
>>>> Perhaps next week is better, I can reserve this time for the CPP. 
>>>> Let me know
>>>> how to proceed.
>>>>
>>>> Cheers,
>>>> Sasha
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>> *From:*Ilya Larin <ilarin at jlab.org <mailto:ilarin at jlab.org>>
>>>> *Sent:*Tuesday, November 17, 2020 4:16 PM
>>>> *To:*halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org><halld-cpp at jlab.org 
>>>> <mailto:halld-cpp at jlab.org>>; Alexander Somov <somov at jlab.org 
>>>> <mailto:somov at jlab.org>>
>>>> *Subject:*FWD, CPP trigger disucssion
>>>>
>>>>
>>>>  Hi Sasha,
>>>>
>>>> Please let us know if you will be able to connect tomorrow 9am to 
>>>> CPP meeting
>>>> or maybe let us know when you can do it: people are waiting to 
>>>> clarify CPP trigger organization details.
>>>>
>>>>  Thank you.
>>>> Ilya
>>>>
>>>>
>>>> _______________________________________________
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>>>> Halld-cpp at jlab.org <mailto:Halld-cpp at jlab.org>
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>
>
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