SLIDE 1 TECHNOLOGY AND TECHNOLOGY AND CONSTRUCTION OF THE SUPERCONDUCTING SYSTEMS SUPERCONDUCTING SYSTEMS
PATRYCJA DYRCZ, University of Science and Technology in Krakow SEBASTIAN ROWIŃSKI, Wroclav University of Technology STANISŁAW NIZIŃSKI, Adam Mickiewicz University in Poznań SUPERVISOR: DR HENRYK MALINOWSKI, LABORATORY VBLHE DUBNA, 22TH JULY 2016
SLIDE 2 THE MAIN MONITORED PARAMETERS
2 Th li id h li l l i th
- 2. The liquid helium level in the
cryostat
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SLIDE 3 SCHEME OF ELECTROMAGNET
Electromagnet without shield. Magnetic field inside isn’t homogenous enough.
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Electromagnet with shield. Magnetic field inside is homogenous.
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SCHEME OF THE CRYOSTAT
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THE FIRST PURPOSE OF THE PROJECT
One of the most important goals in the the superconducting magnet system is superconducting magnet system is temperature monitoring.
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SLIDE 6 DESIGN BRIEF
1. Scope of the current source from 10μA to 500μA. Scope o t e cu e t sou ce
to 500μ 2. Accuracy of the calibration should be 5·10-4 K. 3. Assembly of the heat exchanger. 3. Assembly of the heat exchanger. 4. A large number of sensors. 5 Calibration of the temperature changes from 4 2K to 300K 5. Calibration of the temperature changes from 4,2K to 300K.
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SLIDE 7
DRAFT OF THE SYSTEM
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SLIDE 8 ADRUINO MEGA 2560
The Mega 2560 is a microcontroller board based on the ATmega2560. Operating Voltage is 5V.
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Ope a g
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THE SECOND PURPOSE OF THE PROJECT
Monitoring of the liquid helium level in Monitoring of the liquid helium level in cryostat.
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THE THIRD PURPOSE OF THE PROJECT
Magnetic field measurements Magnetic field measurements and electromagnet power supply. Create project of autonomic system, controlling electromagnet and measuring controlling electromagnet and measuring magnetic field.
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SLIDE 17 MAGNETIC FIELD SENSORS*
MAGNETOMETERS GAUSSMETERS G O S B < 1 mT GAUSSMETERS B > 1 mT
Fluxgate Hall Effect Fluxgate Induction Coil SQUID M t i ti Hall Effect Magnetoresistive Magnetodiode M t t i t Magnetoresistive … Magnetotransistor …
Hall effect sensor is the most common sensor used to measure high magnetic g g fields.
*Macintyre, Steven A. "Magnetic field measurement." ENG Net Base (2000). CRC Press LLC. Retrieved 29 March 2014.
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SLIDE 18
MEASURING MAGNETIC FIELD
Special semicondiuctor Hall Sensors were applied they have almost constant were applied, they have almost constant parameters in 2K - 300K temperature range. There are 5 Hall Sensors located at the measurement unit It can measure measurement unit. It can measure magnetic field in X, Y, Z axes. To measure gradient, we need 2 sensors in one axis, so magnetic field gradient can be so magnetic field gradient can be measured in X and Y axes only.
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SLIDE 19
Measuring magnetic field
There is Hall sensor outside the electromagnet, calibrated to determine magnetic field inside the electromagnet during it’s work.
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SLIDE 20
POWER SUPPLY CONTROLLER
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SLIDE 21
POWER SUPPLY CONTROLLER
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POWER SUPPLY CONTROLLER
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POWER SUPPLY CONTROLLER
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SLIDE 24
OWER SUPPLY CONTROLLER
SLIDE 25 POWER SUPPLY CONTROLLER SOFTWARE SOFTWARE
erruption measure is field in finish
YES
ry ≈100ms
magnetic field range? procedure
NO
increase easure
- 2. switch on power supply
current etic field eld big
NO
finish
YES
SLIDE 26
MEASUREMENT SETUP
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MEASUREMENT SETUP
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MEASUREMENT SETUP
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MEASUREMENT SETUP
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MEASUREMENT SETUP
SLIDE 31
ematic of labview measuring program
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HANK YOU FOR ATTENTION!!! HANK YOU FOR ATTENTION!!!
