Oak Ridge National Laboratory

Physics Division

Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics related subjects. Usually these are held in the Building 6008 large Conference Room, at 3:00 pm on the chosen day, but times and locations may vary. For more information, contact our seminar chairman,

Alfredo Galindo-Uribarri
Tel (Office): (865) 574-6124  (FAX): (865) 574-1268

Thu., March 11, 2004, at 3:00 p.m. (refreshments will be served at 2:40 p.m.)

The TITAN system at TRIUMF, precision experiments employing ion traps on-line

Jens Dilling, University of British Columbia & TRIUMF
6008 Conference Room

The TITAN (TRIUMF’s Ion Trap for Atomic and Nuclear science) system was proposed last year to employ a combination of a linear Paul (or RF) trap, an Electron Beam Ion Trap (EBIT), and a Penning trap system, with the main goal to carry out precision mass measurements on short-lived exotic isotopes at ISAC. Penning traps have been used for over a decade as mass spectrometers at on-line facilities, and have generated an ample variety of important atomic mass data. In general, a relative precision of dm/m ~ 10-7 could be reached. However, often mass data with relative precision of 1*10-8 are needed, particularly for Standard Model tests, CKM matrix unitarity checks and for specific cases in nuclear astrophysics. In order to fulfill the precision requirements, particularly on the short-lived (T1/2 ~ 50 ms) isotopes available from ISAC, TITAN’s mass measurements will be carried out on highly charged ions, charge state boosted in the EBIT. This unique combination of ion traps will enhance the achievable precision by over an order of magnitude. TITAN has received funding this fiscal year and is presently in the initial setup phase. The talk will cover the physics motivation and the system and techniques involved and will give the present status.