UpGrade of JET Gamma-Ray Diagnostics – JET-UPGRADE

Funding: EURATOM-RO Fusion, ANCSI

- Coordinator: National Institute for Laser, Plasma and Radiation Physics, Partner Project managers: Vasile Zoita

Partner:

- National R&D Institute for Optoelectronics – INOE 2000, Partner Project manager: Viorel Braic

OBJECTIVES

Improvement of the Radiation Field Assembly Components system

I. Specific Objectives - INOE 2000

Design of a LiH neutron attenuator

II. Results:

- LiH Safety – Some Issues

• hazardous material.

• reacts violently with water, including water vapors.

• handling of prefabricated LiH needs gloves and dust masks.

• bare LiH can be pumped down to vacuum; it is best to repressurize with dry N₂, Ar.

• LiH cannot be in direct contact with Al.

- Attenuator /container boxes manufacturing

- LiH encapsulation into the Attenuator Boxes

- Attenuator boxes periodical leak testing

- Leak detection of sealed off devices pressurized with mixtures of helium and nitrogen

Commercially available LiH powder in processed into solid disks by USA compacting and hot pressing;

- AB manufactured in UHV technology;

- LiH disks encapsulation in a specialized system;

- AB stored and transported in STC with periodical He leak testing;

Neutron attenuator casing before welding