AMS02 Magnetic Field Measurement

1
AMS-02 Magnetic Field Measurement

• Prof. Chin E. Lin, NCKU, TNN
• TIM Jan. 09, 2007

2
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

3
Fixture Design Concept
4
Actual Fixture on Mockup
5
Fixture Tests

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

6
Mount Support on Mock-up
7
Fixture on Mock-up in NCKU
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Fixture on AMS-01

• Sensor in position

9
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

11
Origin Calibration

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

12
Origin Calibration

• Laser positioning calibration

13
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.

14
Mapping Plane
15
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 ?

16
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.

19
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.

20
Fixture Shipping

• The measurement fixture shipping to Oxford takes
  6-8 weeks.
• We will be ready anytime from today.

21
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.

23
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