ams-02 magnetic field measurement prof. chin e. lin, ncku, tnn tim jan. 09, 2007
TRANSCRIPT
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AMS-02 Magnetic Field Measurement
Prof. Chin E. Lin, NCKU, TNNTIM Jan. 09, 2007
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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
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Fixture Design Concept
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Actual Fixture on Mockup
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Fixture Tests
• We use wooden mock-up to carry on our calibration test and field measurement test at NCKU
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Mount Support on Mock-up
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Fixture on Mock-up in NCKU
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Fixture on AMS-01
Sensor in position
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Fixture on AMS-01
Sensor position
calibration
Hall Sensor
Hall Sensor
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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
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Origin Calibration
• Use laser pointer on both X and Y axes to project an intersection to identify as its origin of probe scanning
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Origin Calibration• Laser positioning calibration
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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.
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Mapping Plane
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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
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Temp O-Ring
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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.
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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.
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Fixture Shipping
• The measurement fixture shipping to Oxford takes 6-8 weeks.
• We will be ready anytime from today.
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AMS-01 Tests
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Fixture on AMS-01 Tests
• We have used the measurement fixture to finish AMS-01 magnetic field measurement.
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Fixture on AMS-01
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AMS-01 Field Measurement
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A
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AMS-01 Data in Memory
• Data acquisition from measurement system and store into database
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Measurement Axis
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A
• A
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AMS-01 Magnetic Field Profile
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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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A
• A
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A
• A