Difference between revisions of "May 2008 Subsystem Review"

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* [[Overview Outline for May 2008]]
 
* [[Overview Outline for May 2008]]
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* [[Electronics Outline for May 2008]] [http://www.jlab.org/Hall-D/software/wiki/index.php/Electronics Electronics]
 
* [[Trigger Outline for May 2008]]
 
* [[Trigger Outline for May 2008]]
 
* [[DAQ Outline for May 2008]]
 
* [[DAQ Outline for May 2008]]

Revision as of 09:34, 9 April 2008

Introduction

The May 2008 Hall D Subsystem Review will cover all aspects of Hall D that have not been reviewed previously under the auspices of the 12 GeV project office. This includes electronics, trigger, DAQ, event and hardware monitoring, experiment and hardware controls, and detector integration, assembly, and maintainability. Milestones for the electronics/trigger/DAQ/monitoring/controls part of the review can be found in Online Major Milestones.

Current planning is for a 1 1/2 day meeting the week of 7-May, with no parallel sessions.


Charge for the Review Committee

No charge for the committee has been established yet (Apr 2008). A very broad possible charge, based on charges from previous reviews, might be:


The scope of this review includes all aspects of the following Hall D systems and components: electronics, trigger, DAQ, event and hardware monitoring, experiment and detector controls, as well as detector infrastructure, integration, installation, maintenance, and safety considerations. Performance requirements, development and construction schedules, costs, and ES&H issues may be reviewed for all systems, as well as any other considerations that may influence the construction and operation of the Hall D detector.

In addition, for electronics systems the scope includes functional design, technology choice, fabrication considerations, testing and quality control, maintainability, and long-term viability. For computing systems the scope includes computing architecture, network design, data flow issues, protocol choices, and network and computing hardware choices. For software the scope includes functional design, complexity, coding and language concerns, testing and quality control, commissioning, operational concerns, and long-term maintainability. For hardware the scope includes design philosophy, material selection, fabrication choices, levels of redundancy, commissioning procedures, costs for materials and labor, quality control, and operational reliability and longevity.

You are asked to address the following questions:

1. Are the technical performance requirements adequate, appropriate, and complete for each system?

2. Do the current designs and plans appear likely to achieve the performance specifications with a low risk of cost increases, schedule delays, and performance problems? Are there opportunities for improvements in cost or performance that the design teams should consider?

3. Are the R&D efforts appropriate, complete, and likely to reduce risks?

4. Have ES&H considerations been adequately incorporated into the designs and plans?


Agenda

Possible agenda topics and speakers:

  • Describe review process and committee charge - Allison or Rolf
  • Intro to 12 GeV project - Allison or Rolf
  • Intro to Hall D physics and detector - Elke or Elton
  • Front-end electronics - Fernando and/or Chris
  • Trigger - Dave D
  • DAQ - Graham or Dave A
  • Electronics/trigger/DAQ/Monitoring/Controls systems and integration - Elliott
  • Infrastructure, installation, assembly, maintenance, safety, etc. - Tim et al.

There may be additional short presentations on particular topics.


Pre-Brief Materials

Elke's Deadlines:

  • Deadline final presentations to Elke 5-May close-of-business
  • Deadline pre-brief material to reviewers: 30-April
  • Deadline pre-brief material to Hall-D group to read: 23-April
  • Drop dead date for prebrief material: 11-April

Outlines:

Topics

Below I list topics the review committee might focus on. Clearly the committee cannot investigate all of these in depth, but we can expect they will want an overview of most of them, and may probe a few in depth.


Electronics

  • preamps
  • discriminators
  • F1TDC, FADC250, FADC125
  • timing distribution system
  • CTP, SSP, GTP
  • TI, TS, TF, TD
  • cable choices
  • HV systems
  • LV systems
  • C-W and other bases
  • SiPM's and other PMT's
  • crate and backplane choices (VXS, ATCA)
  • development and test strategies
  • etc.


Trigger

  • L1 algorithm
  • rates and backgrounds
  • crate sum + global sum strategy
  • overall trigger strategy
  • crate and hardware choices
  • trigger distribution system


DAQ

  • event size
  • data rate
  • computer hardware choices
  • network hardware choices and configuration
  • cpu and network utilization
  • software architecture
  • software components (ROC, EMU, ER, etc)
  • language choices
  • run control
  • farm architecture
  • event tranfer to silo
  • metadata recording


Event and Hardware Monitoring

  • event display
  • event monitoring system
  • alarm system
  • archive/display system


Experiment and Detector Controls

  • overall controls architecture (ECS/SCADA/DCS hierarchy)
  • DCS strategy (PLC usage, control loops, etc)
  • SCADA strategy (tentatively EPICS + perhaps MonAlisa)
  • ECS strategy (AFECS)
  • alarm system
  • archive/restore system
  • magnet and cryo control systems
  • interoperability with accelerator controls system
  • redundancy, failure modes, safety issues


Detector Integration

  • tolerances, keep-away zones
  • cable strategy and layout
  • crate layout
  • power, heat, cooling
  • grounding/shielding/EMC
  • mechanical drawing database
  • sign-off procedures


Detector Construction

  • strategy
  • assembly procedures
  • special tooling and equipment needed
  • personnel and equipment safety, other EH&S, etc.


Detector Maintenance

  • ease and expected frequency of access
  • access/disassembly/reassembly procedures
  • routine maintenance
  • expected component lifetimes
  • personnel and equipment safety, other EH&S, etc.


Presentations