Long neutron ionization chamber for detector for nuclear detection out of piles

The utility model relates to the technical field of nuclear radiation detectors, and particularly discloses a long neutron ionization chamber for a detector for nuclear detection out of piles. The long neutron ionization chamber comprises a case, two or four or six neutron chambers are arranged inside the case and are fixedly connected with each other by aluminum connecting rods, two ends of each connecting rod are fixed onto press covers of the corresponding neutron chambers by the aid of rivets, an end cover is disposed at the rightmost port of the case, an armor cable is connected onto the end cover, and an end cover exhaust pipe is further mounted on the end cover. The long neutron ionization chamber has excellent nuclear performance, corrosion resistance, welding performance and mechanical performance, and is convenient and practical.