A maxi- mum peak power of 660mW at 260.0nm was obtained with a helical hol- low cathode of 1.2m length, 6mm inner diameter and 9mm coil pitch.

• 在放电长度1.；2m；内径6mm；螺距9mm的分段放电管中；在波长260nm时获得最大峰值功率660mW。