Manufacturing of the Drift Tubes: Found Troubles and Given Solutions

1. Manufacturing of the Drift Tubes: Found Troubles and Given Solutions Aitor Zugazaga (ESS-Bilbao) 13 September 2011 DTL mini-workshop, CERN

2. Outline • Introduction of the DT’s • Handling and Cleaning Procedure • Machining Orientation Problems

3. Introduction of the DT’s Body Cover Stem

4. Introduction of the DT’s Separation Ring Sleve Inner Tube

5. Introduction of the DT’s Guide Washer Traction Screw Socket

6. Introduction of the DT’s • The Body and Cover pieces are unique. Each Drift Tube has its own Cover and Body Design.

7. Handling and Cleaning Procedure • Handling of copper parts must be done with care of not touching them bare handed. Gloves must be used always. • Copper parts must be stored in appropiate conditions, protecting them from atmosphere.

8. Handling and Cleaning Procedure • Cooling Fluid must be Halogen and Silicone free. • The clamping of copper must be done with care, due to the softness of the material.

9. Handling and Cleaning Procedure • Also is important the election of the tool. Some tools produce vibrations during the machining operation producing irregular surfaces.

10. Machining Orientation Problems • After some tests it was found that the problem of the machining of the rounded part was the orientation of the copper rod. • Changing the orientation, the tolerances for the critical parts were achieved.

11. Machining Orientation Problems Original 111 Cover Modified 112 Cover

12. Manufacturing of the Drift Tubes: Found Troubles and Given Solutions Aitor Zugazaga (ESS-Bilbao) 13 September 2011 DTL mini-workshop, CERN