1	Ph. D. Defense Committee: Chair: J. H. Edgar Advisor: B. D. DePaola Member: C. L. Cocke Member: C. D. Lin Member: P. M. A. Sherwood Presenter: Hai T. Nguyen
2	MOTRIMS: Magneto-Optical Trap Recoil Ion Momentum Spectroscopy Hai Nguyen, Richard Brédy, Xavier Fléchard, Alina Gearba, How Camp, Takaaki Awata, Johnathan Sabah, Kyle Wilson, and Brett DePaola.
3	OUTLINE Reviews of Cold Target Recoil Ion Momentum Spectroscopy Motivation Experimental Setup Results Conclusion and Outlook
4	COLTRIMS: Principles Cold Target Recoil Ion Momentum Spectroscopy is a technique in which information about the collision is obtained through the measurement of the momentum transferred to the ionized target (atom/molecule).
5	COLTRIMS: Pros & Cons Pros: This technique allows kinematically complete experiments. The good resolution in the measured longitudinal recoil ion momentum allows accurate determination of the inelasticity in the collision and therefore identification of the different collision channels by their different Q-values. Cons: Ultimately, in COLTRIMS, the resolution is limited by the temperature of the target (>100 mK) traditionally delivered by a supersonic jet. Problematic for collisions with excited target.
6	MOTIVATION Collisions with excited target (~ 20%). Resolution is no longer limited by target temperatures (~ 130mK). Cross-section measurements provide rigorous test for theory.
7	EXPERIMENTAL SETUP
8	EXPERIMENTAL RESULTS
9	RESULTS 7 keV Na⁺+ Rb (5l), l = s and p
10	RESULTS 7 keV Na⁺+ Rb (5l), l = s and p
11	MOTRIMS as a probe 7 keV Na⁺+ Rb (5l), l = s and p
12	RESULTS 7 keV Na⁺+ Rb (5l), l = s and p
13	RESULTS 7 keV Na⁺+ Rb (5l), l = s and p
14	RESULTS 7 keV Na⁺+ Rb (5l), l = s and p Compared to calculation
15	ENERGY-DEPENDENT RESULTS Compared to calculation
16	ENERGY-DEPENDENT RESULTS Compared to calculation
17	MOTRIMS as a probe 7 keV Na⁺+ Rb (5l), l = s and p
18	MOTRIMS as a probe 7 keV Na⁺+ Rb (5l), l = s and p
19	MOTRIMS as a probe 7 keV Na⁺+ Rb (5l), l = s and p
20	MOTRIMS as a probe 7 keV Na⁺+ Rb (5l), l = s and p
21	Other Collision System: Difficulty
22	RESULTS 7 keV Rb⁺+ Rb (5l), l = s and p
23	RESULTS 7 keV Rb⁺+ Rb (5l), l = s and p
24	RESULTS 7 keV Rb⁺+ Rb (5l), l = s and p
25	SUMMARY ‘Simultaneous’ measurements of excited state fraction and relative cross sections. Kinematically complete collisions study for alkali ion – trapped atoms including energetically degenerate systems. MOTRIMS is a powerful tool for ion-atom collisions. Using MOTRIMS as a probe at MOT dynamics under some perturbation.
26	THANKS Committee Members MOTRIMS Group JRML Support Staff: Kevin Carnes, Scott Chainey, Charles Fehrenbach, Bob Geering, Bob Krause, Vince Needham, Al Rankin, Carol Regehr, and Mike Wells.
27	Questions & Answers Cooling and Trapping Optics Layouts Experimental Setup Analysis Excited State Formula? Others Systems
28	SIMPLE OPTICS LAYOUT
29	SIMPLE OPTICS LAYOUT
30	Projected TOF
31	RESULTS 7 keV Na⁺+ Rb (5s, 5p)
32	Cooling and Trapping
33	RESULTS 7 keV Li⁺+ Rb (5l), l = s and p
34	RESULTS 7 keV Li⁺+ Rb (5l), l = s and p
35	Multi-Projectile Source
36	Probe: 7 keV Na⁺ + Rb (5l)
37	7 keV Li⁺ + Rb (5l)
38	Cross Sections 7 keV Li⁺+ Rb
39	7 keV Li⁺+ Rb Scattering Angle Information
40	7 keV Li⁺+ Rb Scattering Angle Information
41	7 keV Li⁺+ Rb Scattering Angle Information
42	7 keV Li⁺+ Rb Scattering Angle Information
43	RESULTS 6 keV Cs⁺+ Rb (5l), l = s and p
44	RESULTS 6 keV Cs⁺+ Rb (5l), l = s and p
45
46	RESULTS Energy dependent Cs⁺+ Rb (5l), l = s and p
47	Excited State Fraction Formula?
48	So, What’s the Problem!?
49	So, What’s the Problem!?
50	Preliminary Results