Figure 11
Timing diagram. Top: laser pulses once per millisecond; 2nd: X-rays admitted by the chopper, 2 µs bursts every 200 µs; 3rd: high-voltage gate; 4th and 5th (bottom): the two patterns of current in the Helmholtz coils to put the signal into the top trace and the reference below (A), or vice versa (B). |