AMS-02 Magnetic Field Measurement

Prof. Chin E. Lin, NCKU, TNNTIM Jan. 09, 2007

AMS-02 Magnetic Field

• AMS-02 magnetic field measurement to identify the interior magnetic field by a servo system in planar scanning

• The exterior magnetic field is only identified by some specified locations

Fixture Design Concept

Actual Fixture on Mockup

Fixture Tests

• We use wooden mock-up to carry on our calibration test and field measurement test at NCKU

Mount Support on Mock-up

Fixture on Mock-up in NCKU

Fixture on AMS-01

Sensor in position

Fixture on AMS-01

Sensor position

calibration

Hall Sensor

Hall Sensor

Magnetic Field Sensor

• We use a SYPRIS Co. F. W. BELL Model 7030 Gauss/Tesla Meter, with 3D probe for 300 k Gauss（ 30 Tesla） in 1 m Gauss（ 0.1 μ Tesla） resolution

Origin Calibration

• Use laser pointer on both X and Y axes to project an intersection to identify as its origin of probe scanning

Origin Calibration• Laser positioning calibration

Field Mapping

• AMS-02 magnetic field mapping will run a little more than one quarter of the overall interior volume, assuming the field distribution is x- and y- symmetrical.

• Initially, we need to identify the symmetry by a few symmetrical locations

• The servo system is controlled to run only one quarter. Otherwise, we have to do full plane mapping.

Mapping Plane

Where to Mount

• On the original design, we found from the four mounting holes to use.

• However, currently, the temp O-ring has four seal attachments using the same mounting holes.

• Can they be shifted ?

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Fixture Mounting

Temp O-Ring

Considering O-Ring

• We reduce the planar size to consider the temporary O-ring. The scanning distance is 80 mm less in diameter.

• The scanning control software is adjustable to fit for O-ring.

Measurement in SCL

• We try to finish the AMS-02 interior field measurement within 7 days

• We need to prepare 1-2 days before mounting on to AMS-02

• The fixture is about 500 lbs. We need help by a crane to lift it up.

Fixture Shipping

• The measurement fixture shipping to Oxford takes 6-8 weeks.

• We will be ready anytime from today.

AMS-01 Tests

Fixture on AMS-01 Tests

• We have used the measurement fixture to finish AMS-01 magnetic field measurement.

Fixture on AMS-01

AMS-01 Field Measurement

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AMS-01 Data in Memory

• Data acquisition from measurement system and store into database

Measurement Axis

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AMS-01 Magnetic Field Profile

Exterior Measurement

• Due to CSIST site constraint where AMS01 is located, we can only measure half spherical for less than 2 meters outside the main body

• From an axis, locating at 120 degree, to both side with each step of 15 degree, at 1 meter and 1.5 meter from top to down

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