p25 interface 5/19/08 #1 martin cooper, los alamos co-spokesperson for the edm project for...

P25

Interface 5/19/08 #1

Martin Cooper, Los AlamosCo-spokesperson for the EDM Project

for presentation to

The nEDM Subsystem ManagersDuke University, Durham, NC

May 19, 2008

Subsystem Interface Issues

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Scheme for Inter-Subsystem Links

• Keep the number of logical links between subsystems to a manageable number

• Do not put in items that require communication, just do the communication

• Put in physical conflicts – Examples:• 3HeS full system test cannot take place until the

CDS full system test is complete and the dual-use cryostat is available

• The counting house must be inside the building before the cryostat because of mechanical interference

• The rail system and cryostat support must be present before the cryostat is shipped

• All inter-subsystem logic links will be controlled by Martin

• Kim will tell you how to request links you think are necessary

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Issues to Resolve

• Kim and Martin uncovered a number of issues between subsystems to resolve

• Martin will explain them now• Due to a 5 minute time limit per issue, we can

see if the answer is obvious, but if not, they should be settled fairly soon in private, e.g. at the subsystem managers’ teleconferences

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Order of Assembly1.4 3HeS1.5 Magnets1.9 Assembly

The current reworked schedule has the magnet subsystem on the critical path and determining the end of the project. Does the project office have the freedom to interchange the order of the detector assembly, e.g. 3HeS and Magnets, to achieve the earliest finish to the project?

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Insulation Volume1.3 Cryogenics1.5 CDS

Do we need to build two G-10 insulation volumes, one for the cryogenics qualification and one for the CDS full system tests? Do we need two back planes? How are they different? What is included in WBS 1.3.2.2?

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Vacuum Feedthroughs1.3 Cryogenics1.4 3HeS1.5 Magnets1.6 CDS1.7 Electronics

Who is responsible for the vacuum feedthroughs for all the wires that go between the inside of the cryostat and the outside electronics?

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Cryogenic Services1.3 Cryogenics1.8 Infrastructure

The old WBS had mechanical, electrical, and plumbing preparations in the cryogenics subsystem, presumably for assembly at NCSU. Should these be moved to the infrastructure subsystem for assembly at ORNL?

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Boundary1.4 3HeS1.6 CDS

Where is the boundary between the 3HeS and CDS subsystems in regards to plumbing and the V1 actuator?

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Purifier1.3 Crogenics1.4 3HeS

Are we using the internal purifier (0.3 K) or an external McClintock purifier (1.2 K)? The decision depends on the 3He transport reference design.

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Injection1.1 R&D1.4 3HeS

What is the difference between the injection test being performed as part of the R&D and the one in the 3HeS WBS?

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Another cryostat1.4 3HeS

Is the cryostat purchased for the full valve test the same as the one listed in the 3HeS WBS 1.4.7.4?

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Kerr Mirrors1.5 Magnets1.6 CDS1.8 Infrastructure

Can the Kerr HV-monitor mirrors be mounted on the magnet system?

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EPICS and DAQ1.2 Guides1.3 Cryogenics1.4 3HeS1.5 Magnets1.6 CDS1.7 Electronics

When are the EPICS slow control systems needed for each subsystem? How complete do they need to be? Do they include the readout modules? How much DAQ is expected to come with the EPICS systems?

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Storage Tanks1.3 Cryogenics1.8 Assembly

Are the large gas storage tanks outside the building part of the cryogenics or infrastructure subsystems?

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Vibration Isolation1.3 Cryogenics1.6 CDS1.8 Infrastructure

Is the vibration isolation of the pumps to protect the SQUIDS the responsibility of the cryogenics or the infrastructure subsystem?

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Insert Scaffolding1.8 Infrasturcture1.9 Assembly

WBS 1.9.2.2 is labeled “assemble insert scaffolding.” Is this an infrastructure or assembly subsystem responsibility? How is it different from the insertion fixture being designed for general insertion and removal of the CDS?

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Last Meters of Guide1.2 Guides1.9 Assembly

Can CD-4 be achieved for the beam line without installing the last several meters of guide? Can the last several meters be installed without further beam tests but with the expectation of good performance?

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Interconnect Plumbing1.4 3HeS1.6 CDS

What does the CDS need to mock up the 3HeS during its full system test? What does the 3HeS use to mock up the CDS during its full system test?

p25 interface 5/19/08 #1 martin cooper, los alamos co-spokesperson for the edm project for...

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