Experimental Setup and FEL Interface Will Williams and Zheng-Tian Lu Argonne National Lab.

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Presentation transcript:

Experimental Setup and FEL Interface Will Williams and Zheng-Tian Lu Argonne National Lab

2 Goal: Produce Metastable Krypton using optical fields 4p 6 1 S nm 5s[3/2] 0 1 5p[3/2] 2 819nm 5s[3/2] 0 2 5p[5/2] 3 811nm Cycling Review from this morning: 1)Currently use an RF discharge source 2)Poor efficiency 3)Contamination problem 4)Replace with optical source

3 Atomic Beam Line: Side View Krypton in 26 inches

4 Capillary Plate (5mm thick; 50  m holes) Atomic Beam Line: Side View Krypton in Atomic Beam travelling to the right 26 inches

5 Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light into slide 4p 6 1 S nm 5s[3/2] 0 1 5p[3/2] 2 819nm 5s[3/2] 0 2 5p[5/2] 3 811nm Cycling Atomic Beam Line: Side View Krypton in Atomic Beam travelling to the right 26 inches

6 Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light into slide Atomic Beam Line: Side View Krypton in Atomic Beam travelling to the right 26 inches

7 Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light into slide 250 L/s Turbo RGA Atomic Beam Line: Side View Krypton in Atomic Beam travelling to the right 26 inches

8 Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light into slide 250 L/s Turbo RGA Photo- detector Atomic Beam Line: Side View 811nm into slide Krypton in Atomic Beam travelling to the right 4p 6 1 S nm 5s[3/2] 0 1 5p[3/2] 2 819nm 5s[3/2] 0 2 5p[5/2] 3 811nm Cycling 26 inches

9 Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light into slide 250 L/s Turbo RGA 811nm into slide Photo- detector Atomic Beam Line: Side View Krypton in Atomic Beam travelling to the right 26 inches

10 Krypton in Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light into slide Atomic Beam travelling to the right -> Atomic Beam coming out of slide Atomic Beam Line: Side View -> Looking down beam line toward the source

11 Atomic Beam coming out of slide Atomic Beam Line: Looking down beam line toward the source Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light

12 Atomic Beam Line: Looking down beam line toward the source Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light Custom Flange MgF Window FEL light Atomic Beam coming out of slide

13 Atomic Beam Line: Looking down beam line toward the source Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light Gate Valve Angle Valve Custom Flange MgF Window FEL light Atomic Beam coming out of slide

14 Atomic Beam Line: Looking down beam line toward the source Capillary Plate (5mm thick; 50  m holes) 819nm (retro-reflected) FEL light Gate Valve Angle Valve Custom Flange MgF Window VUV detector FEL light Atomic Beam coming out of slide

819 nm laser setup Lasers 811 nm laser setup

Lab Overview

Beamline Table 40 inches x 24 inches

nm Expectations

19 Expectations 1.24nm  MHz (~2.5 fm)

20 Assumes a laser waist of 3.5mm Expectations  MHz (~2.5 fm) 1.24nm

Expectations Parameters 819 laser100x saturation FEL FWHM1.24nm FEL waist3.5mm t Interaction 28.5  s

Expectations 1 x RF Discharge efficiency ~10 -4 Parameters 819 laser100x saturation FEL FWHM1.24nm FEL waist3.5mm t Interaction 28.5  s

Expectations Expected maximum efficiency1 x Expected maximum metastable flux1 x 10 9 atoms/sec/cm 2 Detectable flux (fluorescence)1 x 10 8 atoms/sec/cm 2 Detectable flux (lock-in)1 x 10 7 atoms/sec/cm 2 Detectable flux using a lock-in amplifier is about ~1% of our expected metastable flux.

End of Slideshow

25 Atomic Beam Line

26

Laser To Exp. 2 feet T.A. 819 nm laser setup Lasers

811 nm laser setup Laser To Exp. 1.5 feet 2 feet