| 摘要 |
A discharge tube is realized which is excellent in discharge response characteristic when a voltage is applied. A discharge tube 10 includes a first electrode 12, a second electrode 14 and a third electrode 16 which are arranged in parallel, an airtight outer enclosure 22 including a first tubular body 18 sandwiched between the first electrode 12 and the second electrode 14, and a second tubular body 20 sandwiched between the second electrode 14 and the third electrode 16, a through-hole 24 is formed in the second electrode 14 and allows internal spaces of the first tubular body 18 and the second tubular body 20 to communicate with each other, on the first electrode 12 and the third electrode 16, discharge electrode portions 26 are formed which protrude toward a center of the airtight outer enclosure 22 and are disposed opposite to each other with a discharge gap 28 provided in between, and a discharge gas is filled in the airtight outer enclosure 22, and the discharge electrode portion 26 of the first electrode 12 and the discharge electrode portion 26 of the second electrode 14 are inserted and arranged in the through-hole 24 of the second electrode 14. |
