TCHF Alternating current heater

TCHF Front

It is possible to heat an optical vapor cell using a high frequency alternating current without affecting the performance of the atoms. With frequency up to 500 kHz, this heater minimizes the angular perturbation of atomic spins.

Features

Interface

Images

TCHF Rear

Options

Two output voltage ranges are available.

The 80V unit must be used with higher resistance heaters to avoid power dissipation in the controller.

Operation

When changing the temperature sensor, it is necessary to specify a reference resistance and reference temperature using the following commands:

  1. Specify the sensor type using therm.sensor.type (1: RTD, 2: NTC thermistor).
  2. Set the sensor tempeature coefficient using therm.sensor.coef, which may be ⍺ = 0.003850 for platinum RTDs or β = 3250 for NTC thermistors obeying the Steinhart–Hart equation.
  3. Set the sensor reference resistance therm.sensor.R0 in ohms.
  4. Set the sensor reference temperature therm.sensor.T0 in degrees C if different from 20 C.

Firmware

Firmware update: TCHF-R5-firmware-2019-10-01-10a4cf.bin

Ordering