TECHNOLOGY AND TECHNOLOGY AND CONSTRUCTION OF THE SUPERCONDUCTING - PowerPoint PPT Presentation

TECHNOLOGY AND TECHNOLOGY AND CONSTRUCTION OF THE SUPERCONDUCTING SYSTEMS SUPERCONDUCTING SYSTEMS PATRYCJA DYRCZ, University of Science and Technology in Krakow SEBASTIAN ROWI Ń SKI, Wroclav University of Technology STANIS Ł AW NIZI Ń SKI, Adam Mickiewicz University in Pozna ń SUPERVISOR: DR HENRYK MALINOWSKI, LABORATORY VBLHE DUBNA, 22 TH JULY 2016

THE MAIN MONITORED PARAMETERS 1. Temperature 2 Th 2. The liquid helium level in the li id h li l l i th cryostat 3. Magnetic field 2

SCHEME OF ELECTROMAGNET Electromagnet without shield. Magnetic field inside isn’t homogenous enough. Electromagnet with shield. Magnetic field inside is homogenous. 3

SCHEME OF THE CRYOSTAT 4

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. 5

DESIGN BRIEF 1. Scope of the current source from 10 μ A to 500 μ A. Scope o t e cu e t sou ce o 0 μ to 500 μ 2. Accuracy of the calibration should be 5·10 -4 K. 3. 3. Assembly of the heat exchanger. Assembly of the heat exchanger. 4. A large number of sensors. 5 5. Calibration of the temperature changes from 4 2K to 300K Calibration of the temperature changes from 4,2K to 300K. 6

DRAFT OF THE SYSTEM 7

ADRUINO MEGA 2560 The Mega 2560 is a microcontroller board based on the ATmega2560. Operating Voltage is 5V. Ope a g o age s 5 8

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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. 10

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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. 16

MAGNETIC FIELD SENSORS* MAGNETOMETERS G O S GAUSSMETERS GAUSSMETERS B < 1 mT B > 1 mT  Fluxgate  Fluxgate  Hall Effect  Hall Effect  Induction Coil  Magnetoresistive  SQUID  Magnetodiode  Magnetoresistive  Magnetotransistor M t i ti M t t i t … … Hall effect sensor is the most common sensor used to measure high magnetic g g fields. 17 *Macintyre, Steven A. "Magnetic field measurement." ENG Net Base (2000) . CRC Press LLC. Retrieved 29 March 2014.

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. 18

Measuring magnetic field There is Hall sensor outside the electromagnet, calibrated to determine magnetic field inside the electromagnet during it’s 19 work.

POWER SUPPLY CONTROLLER 20

POWER SUPPLY CONTROLLER 21

POWER SUPPLY CONTROLLER 22

POWER SUPPLY CONTROLLER 23

OWER SUPPLY CONTROLLER

POWER SUPPLY CONTROLLER SOFTWARE SOFTWARE measure is field in finish erruption YES magnetic field range? procedure ry ≈ 100ms NO easure increase 1. switch on heater etic field current 2. switch on power supply eld big NO ough? YES 1. switch off heater finish

MEASUREMENT SETUP

MEASUREMENT SETUP

MEASUREMENT SETUP

MEASUREMENT SETUP

MEASUREMENT SETUP

ematic of labview measuring program

HANK YOU FOR ATTENTION!!! HANK YOU FOR ATTENTION!!!