EPR spectroscopy endstation
EPR spectroscopy endstation is a multi-functional setup located at the Novosibirsk Free Electron Laser Facility. The endstation consists of 3 EPR machines, namely (i) a pulsed X-band EPR; (ii) a continuous wave X-band EPR; (iii) a time-resolved X-band EPR equipped with a Lotis TII Nd:YAG laser. To be continued...
Hardware
Pulsed machine
| Component |
Model |
| Pulse generator / ADC / DAC |
Insys FM214x3GDA (312.5 MHz TTL, 2.5 GHz ADC, 1.5 GHz DAC) |
| Magnetic field controller |
BH15 |
| Microwave bridge |
Micran X-band v2 |
| Temperature controller |
Lakeshore 335 |
CW EPR machine
| Component |
Model |
| Lock-in amplifier |
Stanford Research SR-850 |
| Frequency counter |
Agilent 53131A |
| Temperature controller |
Lakeshore 335 |
| Magnetic field controller |
BH15 |
TR EPR machine
| Component |
Model |
| Oscilloscope (primary) |
Keysight DSOX3034A |
| Oscilloscope (secondary) |
Keysight DSOX2012A |
| Frequency counter |
Agilent 53131A |
| Temperature controller |
Lakeshore 335 |
| Magnetic field controller |
BH15 |
Other instruments
| Component |
Model |
| NMR gaussmeter |
Sibir 1 |
Automated tune-up and measurement
The pulsed machine can be driven unattended by
epr_auto, a YAML protocol runner that ships with the
endstation's Atomize_ITC
build: it tunes the spectrometer (vane power, working field, integration
window, phase, pulse calibration, repetition rate), runs T2 / T1
measurements with SNR- and time-budget-driven scan counts, judges every
result and records a full run manifest. See the
epr_auto overview for the manual.