1. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI1 Status of laser system TPC meeting, CERN, 7-8 October 2003 Børge Svane Nielsen, Niels Lindegaard, Jørn Westergaard Niels Bohr Institute Work and developments since June 2003:  Assembly of short laser rods  Full rod production and installation  Status of quartz optics  Mechanics on end-plates  Controls

2. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI2 Rod gluing and installation 1.Drill holes in short rods: done 2.Mount mirror bundles in support rings: done 3.Glue mirror support rings onto short rods: done 4. Glue short rods into full length rods at CERN. Scheduled to commence 20 October.  alignment fixed during gluing, using green laser 5.Angle measurements on final rod possible in lab at CERN before installation, using same green laser 6.Angle measurements possible again during rod installation in field cage, using same green laser 7.Re-measurements with TPC in final orientation

3. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI3 Short laser rods & rings Micromirror positions as seen by laser beam: Near end-plates Near central electrode

4. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI4 Short rod gluing at CERN

5. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI5... awaiting full rod gluing: All rods are numbered with final destination and micro-mirror numbers for construction database

6. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI6 Green laser assembly Green laser has been fitted with telescope to produce 20 mm beam will be used for full length rod gluing and (with 90  prism) for installation of rods in FC should be used again to re-measure angles with horizontal TPC TPC end plate

7. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI7 Other on-going activities  Quartz components for end-plates and laser hut ordered: Delivery has started of 22 prisms of 2 types, 28 beam splitters of 4 different specs, 10 mirrors of 2 types, 45 windows of 2 types. Testing started  Ray has progressed on the placement of the laser hut   Design in progress on opto-mechanical supports on end-plates 3d CAD drawings of TPC end plates being made for clarity   DCS: laser remote control: RS-232 3-axis adjusters control: Ethernet or RS-232 cameras: USB to PC downstairs, as ITS alignment discussing collaboration with M.Cherney / Creighton U.

8. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI8 Laser hut placement

9. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI9 Beam transport on end plates limited space between TPC and space frame  move beam transport 10º from vertical plane special prism ”knee” in beam transport on shaft side prism Muon side Shaft side

10. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI10 3d system drawing

11. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI11

12. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI12

13. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI13

14. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI14

15. TPC meeting, CERN, 7-8 October 2003Børge Svane Nielsen, NBI15 Laser system principle