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AMS02 Integration @ CERN 15 min Integration & Assembly Plan Status (R.Becker) 15 min AMS Integration Plan Overvi - PowerPoint PPT Presentation

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AMS02 Integration @ CERN 15 min Integration & Assembly Plan Status (R.Becker) 15 min AMS Integration Plan Overview (T.Martin) Mechanical Integration & AMS 02 Assembly Plan Status R.Becker (MIT) Technical Interchange Meeting October 26, 2005 IHEP & CERN GSE status:

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AMS02 Integration @ CERN

15 min Integration & Assembly Plan Status (R.Becker)

15 min AMS Integration Plan Overview (T.Martin)

R.Becker (MIT) October 24, 2005

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Mechanical Integration &

AMS 02 Assembly Plan Status

R.Becker (MIT)

Technical Interchange Meeting October 26, 2005

R.Becker (MIT) October 24, 2005

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IHEP & CERN GSE status:

1) Scaffolding,

2) Rotating Assembly (&Test-beam) Stand,

3) Thermal vacuum Test Stand

Scaffolding Status

Manufacturing drawings Completed

(thanks to Dr. Z. Zhang and The IHEP team: Prof. Hesheng Chen, Prof. Y.Lu,. H.Zhuang)

CERN safety will review the design end of this month (next week).

Material procurement and Manufacture is set to begin Nov 1!

R.Becker (MIT) October 24, 2005

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Rotating Assembly Stand (RAS) Status:

RAS CAD model 90% complete.

Large Structural beams made of Stainless steel or aluminum are difficult to procure. Z.Zhang will provide profiles available in China,

Upon which the final structural design can be calculated and design will be complete.

Still have choice of rotation and lifting mechanisms

Gears selected & can be ordered

After collaboration chooses.

(from European vendors)

R.Becker (MIT) October 24, 2005

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1 m Vertical Translation

180 Deg Rotation

R.Becker (MIT) October 24, 2005

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RAS Requirements Revisited

Rotation accuracy?

< 5 arcmin


+/- 2 deg?

R.Becker (MIT) October 24, 2005

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  • Nabtesco’s

  • Cyclidal gear head driven by a small motorized worm gear will allow rotations with 5 arcmin precision

  • AMS rotation speed less than 1rpm

  • Worm gear inherently locks when the worm gear is stopped

  • Motor has an emergency e-stop as a second stopping mechanism

  • Requires adapter plate to fit worm gear with cycloidal gear

R.Becker (MIT) October 24, 2005

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  • Bonfiglioli’s Planetary gear:

  • Cheaper alternative

  • Can be installed off the shelf

  • Precision +/- 2 degrees

  • (commonly used in cranes and cement mixers..)

  • Needs both E-stop for the motor

  • And another mechanical braking device

R.Becker (MIT) October 24, 2005

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For the Test-beam:

Vertical displacement:

Do we need very precise continuous positioning? (Power screw with servo motor)

Or are a few set vertical positions ok?

(then we can lift manually by cranking the power screw or lift via crane and pin roll block into position)

Lateral translation & Vertical axis Rotation:

Currently the plan is to lift AMS via air cushions and then translate or rotate.

To avoid inaccuracy due to float, it is recommended to position AMS and then set it down by turning the air cushions off.

Is this ok for Test beam data taking?

R.Becker (MIT) October 24, 2005

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RAS Remaining work:

Final profiles need to be selected to finalize calculations

Calculations need to be reviewed and OK’d by JS, NASA, and CERN

After official OK, IHEP will produce manufacturing drawings, procure materials, manufacture, assemble and test

Design test beam structure!

AMS Mass simulator for the RAS:

IHEP Plans to build an AMS Mass simulator to test the stands structure and rotating capabilities.

AMS mechanical info to accomplish this have been furnished:

(AMS’s shuttle interface and trunion drawings, weight, CG, and Moment of inertia)

Z.Zhang, supported by the IHEP team are designing this now.

R.Becker (MIT) October 24, 2005

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TVT Stand Status:

Visited ESTEC TVT chamber in Nordwejk:

Obtained 3D model of Chamber including Mechanical interfaces and feed-through ports:

R.Becker (MIT) October 24, 2005

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Assembly Plan:

What Procedures and Documentation do we need for Assembly?

According to NASA & JS recommendation: (thanks! C.Tutt, T.Martin)

1) Assembly Plan:(for the management –coordinator for AMS assembly)

Overview of the assembly process: The purpose of which is to:

1) Define what hardware, tools, & GSE

2) Define Logistics: Space, people, what time

required for each step.

Here is where the master assembly schedule fits in! (J.Heilig)

R.Becker (MIT) October 24, 2005

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  • 2) Build Book:(for the hands-on physicists, engineers, and technicians, assembling AMS hardware)

  • 1) A detailed assembly procedure including what exact items are assembled, with what tools and materials, at what specifications.

  • Critical steps and specifications met will have sign-off sheets!

  • (e.g.. screw torques and back-off prevention) (so we know who to blame later)

  • The build book is the “Nuts and bolts” detailed procedure!

R.Becker (MIT) October 24, 2005

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3) Quality Assurance Plan:

(For the DETECTOR RESPONSIBLE, floor manager, and persons assembling hardware)

Description of what we will do to verify that assembly is/was done correctly using correct hardware, materials, & procedure.

(Trent will review the QA plan in detail)

1) Basic procedure (critical steps)

2) Verification (a person to check/double check –example: screw torques.)

3) Validation (detector/subsystem testing)

4) Safety Plan: (for persons assembling hardware & Floor/shift manager)

Description of what we are doing to insure worker and hardware safety

1) Description of Specific hazardous operation & instructions

(not to stand next to cryogenic vent during magnet charge)

2) General safety procedures continually in place

(wear your goggles etc..)

It may be practical to combine QA and Safety plans such that we are constantly reminded of safety along the way!

R.Becker (MIT) October 24, 2005

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  • Next Steps:

  • From the “Assembly List”:

  • Convert Assembly list into a Build book template & have subgroups fill in more details, sign off sheets etc.

  • 2) Generate Assembly and QA Plan together With NASA & JS

  • (T.Martin, C.Tutt J.Heilig)

  • Obtain CERN safety Documentation from which to begin safety plan.

  • Coordinate & Assign individuals/ responsibles to write sections by a set due Date!

  • CERN Integration can not write all the documents alone!

  • Makes sense to have the Build Book, Assembly plan, and QA written by the persons who will DO the work or require the info during assembly

R.Becker (MIT) October 24, 2005

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Assembly Area:

  • Building 867 available for AMS

  • 350 m^2 February 2006

  • Additional 150 m^2 “clean” area end of April 2006

  • Need to organize building a proper Clean Room NOW!!

R.Becker (MIT) October 24, 2005

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AMS Clean Assembly Hall

Air Conditioner



Metal Detector

Waste Box

Small Airlocks


Removable Roofs

R.Becker (MIT) October 24, 2005

G.Viertel (ETHZ)