[Clas12_rich] Items for RICH review prepared by DSG

[Marco Contalbrigo]

Dear Tyler,
together with Marco Mirazita, we have reviewed the tasks we
would need to accomplish for the review. We organize them in 6
items, corresponding to specific documents to be done, see below.
Preparing the documents would be useful to identify and clarify
all the needed procedures and details.

There are many places where the DSG is potentially involved
and can give us useful inputs. Just as a first attempt, we
anticipate below some examples.

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1) Design of the Detector
     Geometry, dimensions, materials, services
     FEM analyses

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2) Operational Manual for Component Tests (acceptance+characterization)
     Procedures and Safety during:

     *) MA-PMTs: what was done by Valery already

     *) Mirrors: characterization in EEL 121c with LED sources

     For DSG: we will be at JLab for the review and CLAS coll.
     meeting. We plan to have the first 4 mirrors delivered
     at that time and to bring at JLab the sensors for the
     acceptance tests. Likely, we will not have ready the
     tools for characterization before July.

     The light sources are LEDs and should not imply any
     safety issue. The sensors are CMOS camera, with get
     power and readout from USB3 ports.

     We will bring the mounting tools and supports.

     We will need:
     - 2 computers with Linux (Debian if possible) and at
       least 2 USB3 ports each;
       one of the computers (at least) with 2 PCI-ex 16x slots;
     - Two optical tables (already there).
     - Mirror storage, likely we will need a sort of rack,
       where the mirrors stay within their envelopes

     *) Aerogel: visual inspection/storage and weigth in EEL-121c

     The aerogel characterization is done offsite
     (Transparency at Washington, and laser tests on samples
     in Italy)

     For DSG: we may need a precise weighting machine (% of
     gram), gloves and masks to avoid human moisture

     *) Electronics: likely we will use the same test-bench of PMTs

     For DSG: for specific tests we would need a
     LV supply (5 V, minimum 2 amps, 2 channels)
     Oscilloscope and Multimeter

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3) Operational Manual for Assembling and Installation
     Procedures and Safety during:
     Mechanics assembling in EEL-124
     Mirror Assembling in EEL-124
     Aerogel assembling in EEL-124
     Electronic Panel assembling in EEL-121c
     Electronic Cooling test in EEL-124
     Test with Cosmics in EEL-124

     For DSG: we would need to define the anchorage of the
     structure and the services (i.e. air cooling system,
     power supplies, ...)

     Trasportation
     Installation

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4) Operational Manual for In-beam Operations
     Procedures and Safety During:
     Commissioning
     Physics Runs
     Interlock
     Slow Control

     For DSG: we would need to finalize the nitrogen
     and cooling systems, the interlock. We would need the
     list of the  wanted hardware, to see what is missing
     and to check what should be controlled by (and is
     compatible with) the CLAS12 slow control.

     We have a complete scheme of the readout services, but
     we would need advice, e.g. on the cables fulfilling
     JLab safety rules (this can be done with Chris). The
     scheme is described in Matteo's talk
     https://clasweb.jlab.org/wiki/images/f/fd/150227_Turisini.pdf

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5) Commissioning
     Components Characterization
     Cosmics
     Test without Beam
     Test With Beam
     Calibration Procedures
     Database
     Simulations
     Reconstruction
     Performance and KPP

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6) Time schedule for completion

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Ciao, Marco.

On Wed, 11 May 2016, Tyler Lemon wrote:

>  Dear Marco Mirazita,
>
>  For the review on June 13, 2016, what items are to be prepared by the DSG?
>
>  Also, we have two more questions:
>  - Would a computer be needed in EEL 121b for the mirror testing? There is a
>  spare one we have here that could be used if one would not be brought for
>  the testing.
>  - What is the model of the low voltage and high voltage supplies that will
>  be used? We would need to know so we can see what types of interlocks we can
>  use for them.
>
>  Please let us know. Thank you in advance.
>
>  Best regards,
>  Tyler
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