AMS-02 Magnetic Field Measurement Prof. Chin E. Lin, NCKU, TNN TIM 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

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 ?

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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