Example for Cyromagnetics Model 4G magnet power supply¶

as always with magnet supplies make sure you have the units as desired and the coil constant set properly before using¶

[1]:

import qcodes as qc
from qcodes import Station, load_or_create_experiment, \
    initialise_database, Measurement
from qcodes.dataset.plotting import plot_by_id
from qcodes.utils.dataset.doNd import do1d

Import qcodes_contrib_drivers Model_4G driver¶

[2]:

from qcodes_contrib_drivers.drivers.Cryomagnetics.Model_4G import Model_4G

[3]:

# Connect to the instrument - this case GPIB

[4]:

magnet = Model_4G('Magnet',address = 'GPIB0::1::INSTR')

The cyromag magnet power supply units have been set to KGauss.

[5]:

magnet.print_readable_snapshot()

Magnet:
        parameter         value
--------------------------------------------------------------------------------
B                  :    None (kG)
B_go               :    None (kG)
IDN                :    {'vendor': 'Cryomagnetics', 'model': '4G', 'serial': '46...
field              :    None (kG)
field_supply       :    None (kG)
hilim              :    None (kG)
lolim              :    None (kG)
persistance_heater :    None
rate_0             :    None (Amps/Sec)
rate_1             :    None (Amps/Sec)
rate_2             :    None (Amps/Sec)
rate_3             :    None (Amps/Sec)
rate_4             :    None (Amps/Sec)
sweep              :    None (Amps/Sec)
timeout            :    5 (s)
units              :    None

[16]:

magnet.units() # default is Gauss

[16]:

'G'

[ ]:

# The field measured in the default units
# Can be used as a set or get function (can change the field or just read the value)
magnet.B() # read the value

0.0

[7]:

magnet.B(0.1) # set the value and go to it in same command

[8]:

# does not set the field only waits until this value has be reached before exiting
# useful for when continuously sweeping to final point and measuring at points along the way
magnet.B_go()

[8]:

0.051

[9]:

# sets the magnet upper limit but does not go to it
magnet.hilim()

[9]:

0.1

[10]:

# now you tell the magnet to go to upper limit value. Other options : 'UP', 'Up', 'up', 'DOWN', 'Down', 'down', 'Pause', 'PAUSE', 'pause', 'ZERO', 'Zero', 'zero'
magnet.sweep('up')

[14]:

# turns on or off the persistance heater
magnet.persistance_heater('off')

[13]:

magnet.sweep('zero') # back to zero

[ ]: