[Moller_intdet] MOLLER Integrating Electronics Satellite meeting on Thursday
Michael Gericke
Michael.Gericke at umanitoba.ca
Fri Apr 29 12:07:19 EDT 2016
Hi everyone,
Here is my summary from yesterday's integrating electronics meeting. Let
me know if I am missing something.
Thanks,
Michael
Summary (largely, but not necessarily, in chronological order):
- Description of the QWeak design (Paul)
- Do we need bipolar input at the ADC input (yes - largely to have
handle a universal signal for diagnostic purposes)
- Discussion about bandwidth matching between BCM/BPM/Detector preamps
and the ADC board analog filter
- bandwidth has to be matched with appropriate sampling rate of the
ADCs
- high bandwidth (>= 500 kHz) and large sampling rate needed for
BCM/BPM
- use the same preamps for all (BPM/BCM/Det)
- we should try to find ADCs that can handle a higher sampling rate
(>= 1 MHz) and a higher resolution (24 bit)
- we can then afford a high bandwidth at the ADC board analog input
and have bandwidth flexibility on the preamp side
- Can we have front panel outputs or data stream information about when
exactly the FPGA starts and stops sampling the ADCs?
- One logic / NIM signal (or bit) to indicate the sampling period
for each helicity window / block
- Or a strobe signal (a pulse for every ADC sample)
- For the purposes of bench tests, can we implement control of the start
and stop for the sampling period so that the boards
can be synchronized (synchronization was assumed for QWeak)
- Assume that all 8 ADCs on each board are synchronized
- Decrease the 40 us distortion at short gate delay (requires a fix on
the analog end of the ADC ?) Paul, I am still really shady
about what needs to be done here and if I really understand this ...
- For diagnostic purposes, implement the possibility to accumulate only
every nth sample in a given block.
Sample 0,4,8 ... in block 1, sample 1,5,9 ... in block 2, sample
2,6,10 ... in block 3, sample 3,7,11 in block 4 ...
- Implement additional information in the data stream, such as minimum,
maximum, and RMS of samples in each block
- For diagnostic purposes, implement the possibility of reading out
every ADC sample at low event rates
(basically running as a waveform digitizer)
- The QWeak modules are able to operate at a readout speed of 600 us /
event for a maximum of 12 boards per VME crate
This is slow, so we need to pursue faster readout.
- implement block readout
- Explore possibility to move to the newer VMS "flavor" crates/board
- implement possibility to switch between slow and fast readout mode
- Front panel real estate: Want more diagnostic output so we need to go
to smaller connectors (NIM) ...
--
Michael Gericke (Ph.D., Associate Professor)
Physics and Astronomy
University of Manitoba
30A Sifton Road, 213 Allen Bldg.
Winnipeg, MB R3T 2N2, Canada
Tel.: 204 474 6203
Fax.: 204 474 7622
On 2016-04-27 10:56 AM, Robert Michaels wrote:
> Ooops !
>
> So, I have changed it to Thursday April 28 from 1:00 to 3:00 in A110.
> Everything the same except TOMORROW.
>
> yours
> Bob
> -------------------------------------------------------
> Robert W. Michaels, Staff Scientist
> http://userweb.jlab.org/~rom (757) 269 7410
> Thomas Jefferson National Accelerator Facility
> 12000 Jefferson Ave, Newport News, VA 23606 USA
>
>
>
> On Wed, 27 Apr 2016, Paschke, Kent Dieter (kdp2c) wrote:
>
>> I thought this was the day before the collab meeting, so, tomorrow,
>> April 28.
>>
>> If so, I’d like to be able to call in during the first hour (I have
>> an engagement from 2-3pm tomorrow).
>>
>> Kent
>>
>>> On Apr 27, 2016, at 9:53 AM, Robert Michaels <rom at jlab.org> wrote:
>>>
>>> Stephanie set this meeting up --
>>>
>>> We'll meet Thursday May 5 from 1:00 to 3:00 in room A110 at JLab.
>>> They have a computer, screen, and phone there, so we'll do a Bluejeans
>>> meeting and I'll announce that info later.
>>>
>>> -------------------------------------------------------
>>> Robert W. Michaels, Staff Scientist
>>> http://userweb.jlab.org/~rom (757) 269 7410
>>> Thomas Jefferson National Accelerator Facility
>>> 12000 Jefferson Ave, Newport News, VA 23606 USA
>>>
>>>
>>>
>>> On Wed, 27 Apr 2016, Robert Michaels wrote:
>>>
>>>> We're talking about a meeting on Thursday May 5 from 1:00 to 3:00 at
>>>> Jlab ? Ok, I'll work on getting a room and phone line. Probably we
>>>> don't need 2 hours, I'm thinking.
>>>>
>>>> Bob
>>>>
>>>>
>>>> On Tue, 26 Apr 2016, Michael Gericke wrote:
>>>>
>>>>> I don't know, should we say 1:00 to 3:00?
>>>> Michael
>>>>
>>>>
>>>> Sent from my Samsung Galaxy smartphone.-------- Original message
>>>> --------From: Krishna Kumar <krishna.kumar at stonybrook.edu> Date:
>>>> 2016-04-26 4:56 PM (GMT-05:00) To: Michael Gericke
>>>> <Michael.Gericke at umanitoba.ca> Cc: Dustin McNulty
>>>> <mcnulty at jlab.org>, "Paul M. King" <pking at jlab.org>, Mark Pitt
>>>> <pitt at vt.edu>, Robert Michaels <rom at jlab.org>, Juliette Mammei
>>>> <jmammei at physics.umanitoba.ca>, Kent Paschke <paschke at virginia.edu>
>>>> Subject: Re: MOLLER Integrating Electronics Satellite meeting on
>>>> Thursday Hi, Michael. What time did you have in mind. I am
>>>> beginning to set up some other appointments at JLab for myself but
>>>> will be happy to block off what time you suggest for Thursday
>>>> afternoon. KK
>>>>
>>>>> On Apr 26, 2016, at 1:49 PM, Michael Gericke
>>>>> <Michael.Gericke at umanitoba.ca> wrote:
>>>>> Bob,
>>>>> Would you by any chance be able to find as a room for Thursday
>>>>> afternoon.
>>>>> Thanks,
>>>>> Michael
>>>>> --
>>>>> Michael Gericke (Ph.D., Associate Professor)
>>>>> Physics and Astronomy
>>>>> University of Manitoba
>>>>> 30A Sifton Road, 213 Allen Bldg.
>>>>> Winnipeg, MB R3T 2N2, Canada
>>>>> Tel.: 204 474 6203
>>>>> Fax.: 204 474 7622
>>>>> On 2016-04-25 6:58 PM, Michael Gericke wrote:
>>>>>> Hello,
>>>>>> As we discussed during the last integrating detector meeting, I
>>>>>> would like to see if we
>>>>>> could have a satellite meeting to discuss the path forward for
>>>>>> the integrating detector
>>>>>> electronics, the day before the collaboration meeting, this
>>>>>> coming Thursday. I'd like to
>>>>>> keep things fairly informal, but perhaps we can start from two
>>>>>> short presentations about
>>>>>> what was done in QWeak and HAPPEX and we go from there. I know
>>>>>> this is very short
>>>>>> notice for Bob, but maybe you can summarize what you sent out
>>>>>> before, if you are available?
>>>>>> The reason for doing this now, is that we are running up against
>>>>>> a time line that is set by
>>>>>> TRIUMF and CFI (see below).
>>>>>> What we have to agree on now, is a time and we have to see if we
>>>>>> can find a room ...
>>>>>> If I am forgetting to include someone who should be part of this
>>>>>> discussion, please forward this
>>>>>> message.
>>>>>> Thanks,
>>>>>> Michael
>>>>>> P.S: Some background / context:
>>>>>> MOLLER was recently adopted as a TRIUMF project (meaning that
>>>>>> TRIUMF agreed to
>>>>>> make resources available for us to use, including their detector
>>>>>> and electronics group with
>>>>>> engineering support). The integrating electronics is also part of
>>>>>> a Canadian Foundation for Innovation
>>>>>> (CFI) proposal that is currently in the early selection process,
>>>>>> making its way through the university
>>>>>> administration.
>>>>>> TRIUMF requires that all proposals that require or ask for TRIUMF
>>>>>> resources go through the same
>>>>>> approval process, regardless of whether they are on-site
>>>>>> experiments or otherwise. This process
>>>>>> includes a number of Gate reviews. Gate 0 happened some weeks ago
>>>>>> and establishes that TRIUMF
>>>>>> wants to adopt/participate in the project. The next step is a
>>>>>> Gate 1 review and this is supposed to
>>>>>> take place before a TRIUMF associated project submits the
>>>>>> notification of intent to CFI, for which
>>>>>> the deadline is June 23. The Gate 1 review involves the following:
>>>>>> 1) Project Charter Sheet
>>>>>> 2) Conceptual Design
>>>>>> 3) Initial Hazard Analysis
>>>>>> 4) Risk Registry
>>>>>> 5) Level 1 work breakdown structure (WBS)
>>>>>> 6) Initial Budget
>>>>>> 7) Resource Estimates
>>>>>> For us, as a group, the most important items to discuss are (2),
>>>>>> (6), and (7). In particular, to make
>>>>>> an estimate of the TRIUMF resources required for the electronics,
>>>>>> we need to start to make decisions
>>>>>> about possible changes or additions to the QWeak ADCs.
>>
>>
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