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Observation of the Opening/Closing of a Diffuse Discharge in a Mixture of C2HF3/He by KrF Laser Irradiation

We have successfully demonstrated the opening of diffuse discharge in a mixture of C2HF3/He (1.5 Torr of He with 0.5% C2HF3) by KrF laser irradiation. After the laser irradiation, a current peak appeared and then the discharge current decreased with a time constant of 200 µs, resulting in the interruption of the current. We have also observed the discharge initiation by KrF laser irradiation of the same fluence.