Kepco

Classes

Module Contents

class Kepco.KepcoMagnet(name, parameter, max_field, volt_to_amp, field_to_amp, axis, rate=0.15, **kwargs)

Bases: qcodes.Instrument

Base class for all QCodes instruments.

Args:

name: an identifier for this instrument, particularly for

attaching it to a Station.

metadata: additional static metadata to add to this

instrument’s JSON snapshot.

label: nicely formatted name of the instrument; if None, the

name is used.

MAX_AMP = 20

This is the qcodes driver for controlling the magnetic field through the Kepco BOP 20-20M. It will control an external voltage source, in order to convert it into a current, used to control the Mercury magnet.

Args

name (str) = the name of the instruemnt.

parameter = a settable parameter controlling the voltage source.

max_field = maximum magnetic field allowed

volt_to_amp = conversion factor from Volt to Ampere.

field_to_amp = converion factor from Tesla to Ampere.

axis (str) = controlled magnetic axis.

rate = maximum sweeping rate allowed (in Tesla)

MAX_AMP = maximum current that Kepco can hndle in Ampere (model dependent).

This is a virtual driver only and will not talk to your instrument.

v1

max_field

volt_to_amp

field_to_amp

axis

rate = 0.15

set_field(value: int | float) → None

Independently from the voltage power supply, the set_val will sweep this instrument and will not jump.

get_field() → int | float

Returns:

number: value at which was set at the sample

get_idn()

Parse a standard VISA *IDN? response into an ID dict.

Even though this is the VISA standard, it applies to various other types as well, such as IPInstruments, so it is included here in the Instrument base class.

Override this if your instrument does not support *IDN? or returns a nonstandard IDN string. This string is supposed to be a comma-separated list of vendor, model, serial, and firmware, but semicolon and colon are also common separators so we accept them here as well.

Returns:

A dict containing vendor, model, serial, and firmware.