ABSTRACT Magnetic Measurement Facility Erika Kazantseva (Budker Institute of Nuclear Physics, Russia) In this presentation main characteristics and work principle of magnetic measurement facility are described. The facility was designed and manufactured in BINP for NSLS II quadrupole magnets and has such features like rapidness and simplicity of measurements, and appropriate accuracy. These properties of the facility allow use it for magnetic measurements of high quality magnets in mass production.
Transcript
ABSTRACTMagnetic Measurement Facility
Erika Kazantseva (Budker Institute of Nuclear Physics, Russia)
In this presentation main characteristics and work principle of magnetic measurement facility are described. The facility was designed and manufactured in BINP for NSLS II quadrupole magnets and has such features like rapidness and simplicity of measurements, and appropriate accuracy. These properties of the facility allow use it for magnetic measurements of high quality magnets in mass production.
BUDKER INSTITUTE OF NUCLEAR PHYSICSNOVOSIBIRSK, RUSSIA
E. Kazantseva, B. Skarbo
REQUIREMENTS FOR MAGNETIC MEASUREMENT FACILITY INVOLVED IN MASS PRODUCTION
Sufficient quality of measurements Little time required for one measurement Simple user interface
1
221
1
1 )sin(!1cossin!1),(n
nnnn
nn
nnn nBAnrCnBnAnrrH
1
minmax cossin!
),,(n
nn
nn
SS
nBnAnRRLNLrdHdSHzr
1
minmax sincos!1
)()(
nnn
nn
nBnAnRR
dttdLN
dttd
dd
dtdEMF
nBnAnRRLNInt nn
n
nn
EMF cos1sin!1
minmax
Measured field
The magnetic flux thru the coil
The voltage we get
Resulting integral of the EMF measured by electronics
Some theory
MECHANICAL CONSTRUCTION
RCN 228
Girder
Lamination Lamination
Coil
Support Support
Standing
QUADRUPOLE 9804 ON STEND
MEASURING SYSTEM
servomotor
angle meas. unit
MEASUREMENT COIL
Length of the measuring part
800 mm
Number of cols 8 (400mm each)
Number of turns in coil 60
blue blue
white
yellow
black
white
yellow
black
SOURCES OF NOISE IN HARMONICS1. Vibrations – dipole component2. PSU – quadrupole component3. External sources – statistic noise4. Self VsDC3 – all harmonics
1 and 2 are compensated via rotating coil compensation
3 is reduced digitally
STATISTIC NOISE IN HARMONICS
TYPICAL MEASUREMENT WINDOW
USUAL RESULTS FOR FIRST MEASUREMENTS
USUAL RESULTS FOR FIRST MEASUREMENTS
RESULTS FOR FINAL TUNING OF 9807-0030
POWER SUPPLY
Current stability-long (8 hours)
±5mA
Max. output current 300AMax. output voltage 24V
Max. output power 6000kW
POWER SUPPLY WINDOW FOR FULL WORKING DAY
CURRENT DIAGRAM FOR MAGNET CYCLE AND MEASUREMENT CYCLE
STANDARD BOLTS RETIGHTENING BEFORE MEASUREMENTS
TECHNOLOGICAL DATA FOR ANGLE MEASUREMENT
STATISTIC OF MAGNETIC AXIS POSITION FOR 30 MEASUREMENTS
Standard Deviation:D(x) = 6,26292E-01 mkm D(y) = 7,13E-01 mkm
CONCLUSION Advantages of magnetic measurement
facility designed in BINP for NSLS II lenses production: Rapidness of measurements More than acceptable quality of measurements Simple user interface Results are accessible right after measurement It still works and works good
