AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 20

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 ASTRID 2 – Status ESLS XX Berlin 2012 Niels Hertel ISA, Aarhus University, Denmark 1

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 ASTRID/ASTRID 2 overview 2

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 Comparison ASTRID/ASTRID 2 Energy 580 Me. V Design current 200 m. A Injection From 100 Me. V microtron once a day 580 Me. V from ASTRID Top-up every 3 -4 minutes. Emittance 140 nm 10 nm Free straight sections 1 (2) 4 3

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 Radiation shielding Because of top-up operation and short lifetime we must shield the entire ring with a concrete wall. In addition, lead bricks are placed at critical points, and bags of lead pellets are used to pack closely around beam tubes etc. The bags each contain 2 kg. 5

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 Insertion devices for ASTRID 2 1. ‘Old’ ASTRID undulator, Danfysik 2. New W 116 mm period, 2 T, 14 poles. Already delivered by Danfysik. 3. New U 53, 1. 06 T, 87 poles, ordered from KYMA. Delivery Dec. 2012 6

AARHUS UNIVERSITET ASTRID 2 Niels Hertel ASTRID 2 lattice SD QF 3 QF 2 SF 19 -20 Nov 2012 SD QF 2 QF 3 • DBA • 6 -fold symmetry • Each period: • 2 combined function dipole magnets (+ pole-face winding) • 2 quadrupole families • 2 sextupole families • 4 H/2 V correctors • 4 BPM’s 7

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 Dipole chamber with pole-face windings Foils are used both for pole face windings and baking. They are insultated with 1 mm thick ceramic ’paper’ and Aluminum foil. 8

AARHUS UNIVERSITET ASTRID 2 injection ASTRID Extr. Kicker septum ASTRID 2 Niels Hertel 19 -20 Nov 2012 ASTRID 2: h=16, Trev=152 ns ASTRID 2 bumpers 1¼ turn extraction ASTRID: h=14, Trev=133 ns ASTRID cycle time: 22. 7 sec. septum

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 ASTRID 1¼ turn extraction 10

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 ASTRID 2 commissioning time line: • June 2011: First extracted beam from ASTRID into the first meters of transfer beamline. • March 2012: All of the transfer beamline and part of ASTRID 2 under vacuum. • May 2012: Beam through transfer beamline and part of ASTRID 2 • July 2012: First turn in ASTRID 2 • August 2012: Many turns in ASTRID 2 • End of October 2012: RF cavity operational • 3 November 2012: First stored beam and first accumulation in ASTRID 2 • Total running time with ASTRID 2 until 1/11 2012: 7469 booster cycles: = 47 hours. • 11

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 ASTRID extraction First beam in extraction beamline June 2011 12

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 RF cavity The 105 MHz cavity (modified MAX IV design) was made by Research Instruments and was fitted with coupler and conditioned in Oct. 2012. The transmitter is a 8 k. W solid state unit from Tomco (Australia). 13

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 First stored and accumulated beam 3/11 2012 Beam current Vacuum Light ! 14

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 3/11 2012: Vacuum effects of 0. 3 m. A stored current Clearing electrodes are not yet in operation 15

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 Diagnostics: • 3 sets of striplines, 1 ring electrode, 26 button pickups, 1 FCT and 1 DCCT • 3/11 2012: 10 bunches from ASTRID stored in ASTRID 2 Stripline signal FCT signal 16

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 Video diagnostics • 13 Gigabit ethernet cameras are used for OTR screens and direct SR observation in both the ring and the transfer beamline • All cameras can be hardware triggered, and can deliver up to 100 frames/sec and down to 4 µsec exposure time. • Position and size analysis in realtime. 17

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 First beamline on ASTRID 2 • The first beamline, UV 1, has been moved into the ASTRID 2 hall. • It has been provided with new optics, and is now waiting to be connected to a bending magnet port on ASTRID 2. • This is expected to happen in January 2013 • All beamlines will be moved by the end of 2013 18

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 A problem… • After baking, we found that we had a leak in one of our undulator chambers. • The leak takes 15 minutes from He is applied to show a leak rate of ~2 e-8 mbar*l/sec. • We have so far been unable to find the precise location of the leak, or to repair it with Vac. Seal 19

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 Commissioning: Next steps • Apply clearing voltage • Optimise transfer beamline and injection • Adjust tunes • Position the beam • Scrubbing……. . • In 2013 we alternate between one ASTRID 2 week and two ASTRID weeks. 20

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 www. isa. au. dk 21

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 22

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 ASTRID 2 Vacuum • Each dipole chamber has › one 150 l/s ion pump with integrated TSP › All interconnecting tubes (Ø 38 mm) are NEG coated • Insertion straights › ID chambers are NEG coated • Bake out: In-situ › Dipole chambers: ~170°C › Interconnecting tubes (NEG): ~200°C › Heating: Thin (<0. 5 mm) heating foil (Soleil) › Isolation: Thin (~1 mm) ceramic “paper” 23

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 Home-built power supplies • For correctors and pole-face windings we need many (~80) bipolar power supplies. • These have been home-built using a modular system with 28 supplies in one rack. • All supplies are ± 20 V, 15 A. • All control is via ethernet. 24

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 25

AARHUS UNIVERSITET ASTRID 2 Niels Hertel 19 -20 Nov 2012 26