1. Gas-filled separator for nuclear structure experiments at ATLAS Darek Seweryniak, ANL

2. Physics HK distributions in heavy nuclei (GS) In-beam spectroscopy of heavy nuclei (GS) Isomers and decays of heavy nuclei (focal plane) Super-heavy searches (focal plane) Fast activities in proton-rich nuclei Gas-cell and traps …

3. Principle of Operation B i = p/q i B = p/q ave vacuumgas q ave ~ (v/v 0 ) Z 1/3 B ~ 0.0227 A/Z 1/3 [Tm]

4. Vacuum vs Gas-Filled M/Q measurement physical separation good beam suppression high efficiency short flight path low efficiency long flight path no mass resolution no separation poor beam suppression Truly complementary devices!

5. Existing Gas-Filled Separators RITU - Jyvaaskylaa BGS – Berkeley SASSYER - Yale GFRS - Dubna GARIS – RIKEN TASCA - GSI

6. Parameters of the Existing Gas-Filled Separators SASSYER DvQhDv 5 2.2 2.4 He RITU QvDQhQv 10 2.2 4.7 He BGS QvDhD 45 2.5 4.7 He Dubna GFRS DQhQv 10 3.1 4.3 H 2 TASCA DQhQv 13 2.4 3.5 He separator configuration [msr] B max [Tm] L [m] gas

7. Important design parameters Solid angle Scattered beam suppression Suppression of transfer products Manageable focal plane size State-of-the-art implantation station – already available Efficient coupling to a 4 Ge array (movable)

8. RITU

9. Where?

10. Thank you!