NAME

Lab::Moose::Instrument::Lakeshore340::Helium3 - Lakeshore Model 340 Temperature Controller for Helium3 operation

VERSION

version 3.931

SYNOPSIS

use Lab::Moose;

# Constructor
my $helium3 = instrument(
    type => 'Lakeshore340::Helium3',
    connection_type => 'LinuxGPIB',
    connection_options => {pad => 22},
    
);

default thermometers: sample => 'A' sample_high => 'B' (optional) sorb => 'C' 1K-pot => 'D'

Can be configured with attributes sample_channel, sorb_channel, one_K_channel.

default heater config: loop 1 (dual Banana jack) => sorb heater loop 2 (Analog output 2, BNC) => he3-pot heater

(Analog out 1 can be used for IVC-sorb)

The attribute T_switch (default: 1.5) determines the used control loop for a given temperature setpoint:

- T < T_switch: use sorb heater, ramp sample heater to zero - T > T_switch: use 3He-pot heater, set sorb to 15K

METHODS

Supports all methods from Lab::Moose::Instrument::Lakeshore340.

condensate

$lakeshore->condensate(
    T_sorb => 35, # default: 35 K
    wait => 1800, # default: 30 min
    T_cool => 0.4, # default: 0.4 K
);

Heat sorb to 35K for 30min. Then turn off sorb heater and wait until sample temperature is below 400mK.

set_T

$helium3->set_T(value => 0.345);

Behaviour depends on the attribute value T_switch (see "Synopsis").

COPYRIGHT AND LICENSE

This software is copyright (c) 2025 by the Lab::Measurement team; in detail:

Copyright 2022       Simon Reinhardt

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.