Physics cases for tracking Calculations made by Lisbon and Sevilla. Similations by D. Rodriguez (Huelva)

19C at the Low Energy Branch (LEB) Settings 1: 48Ca energy: 400 MeV/u. Graphite target:  = 3 g/cm2 Degrader 1: Al with  = 20.9 g/cm2. Degrader 2: Al with  = 10.5 g/cm2. Without contaminants. Settings 2: 48Ca energy: 400 MeV/u. Graphite target:  = 3 g/cm2 Degrader 1: Al with  = 20.9 g/cm2. Same yield of 20N and 19C. Calculations courtesy of David Boutin

The Low Energy Branch (LEB) 19C estimates Settings 1

Beam parameters and tracking system <E(11Be)> = 38 MeV/u <E(19C)> = 8.4 MeV/u EFWHM = 3 MeV/u  x (19C)= 344  mm mrad y (19C)= 376  mm mrad  x (11Be)= 344  mm mrad  y (11Be)= 376  mm mrad 30 cm C8H8 (for 11Be) 1 mg/cm2 Diameter: 10 cm Track1 DSSSD (20 m) SeD? 2 m 11Be Track2 DSSSD (20 m) SeD? 19C 208Pb (for 19C) 1 mg/cm2 Diameter: 10 cm

Detector setup Detection set-ups: - E1 : DSSSD Si-40m. E1 E2 E/ E3 E Detection set-ups: - E1 : DSSSD Si-40m. - E2 : DSSD 200 m. E/ E3 : Single PAD 1.5 mm. E : CsI 6 cm. Pulse shape analysis. Time of flight. 40º 1) d = 17 cm Angular resolution: 2º. Pixel: 3x3 mm2. 30º 18C 19C 19C @ 160 MeV 10º 2) d = 34.4 cm Angular resolution: 2º Pixel: 6x6 mm2 Beam Target 10Be 0º d 3) d = 68.8 cm. Angular resolution: 2º Pixel: 1.2x1.2 cm2

19C Elastic scattering + break-up (no tracking) 20 40 60 80 100 120 140 20 40 60 80 100 120 140 E /MeV 1) E /MeV 2) 19C 19C 18C 18C 50 100 150 200 250 50 100 150 200 250 Etotal /MeV Etotal /MeV E = E1+ E2 Detector resolution 2% (Si) 20 40 60 80 100 120 140 E /MeV 3) 19C 18C 18C 50 100 150 200 250 Etotal /MeV

19C Elastic scattering + break-up (tracking) 20 40 60 80 100 120 140 20 40 60 80 100 120 140 E /MeV 1) 2) 19C 18C 18C 19C t = 1 ns 50 100 150 200 250 50 100 150 200 250 Etotal /MeV Etotal /MeV 20 40 60 80 100 120 140 3) 3) E /MeV 18C 3) 19C High time resolution needed SeD 50 100 150 200 250 Etotal /MeV

11Be Elastic scattering + break-up 20 40 60 80 100 120 140 3) No tracking 10Be E /MeV 10Be 11Be E = E1+ E2 + E3 Detector resolution 2% (Si) Detector resolution 10% (CsI) 50 150 250 350 450 Etotal /MeV 20 40 60 80 100 120 140 20 40 60 80 100 120 140 E /MeV 3) Tracking 3) Tracking+ pixel t = 60 ps 10Be 11Be 50 150 250 350 450 50 150 250 350 450 Etotal /MeV Etotal /MeV

Low energy vs high energy Beam Energy Velocity Collision time (a=2 fm) Maximum excitation energy Timing resolution (dv/v=1%,L=2m) 5 MeV/u 0.1 c 20 fm/c 10 MeV 0.66 ns 20 MeV/u 0.2 c 10 fm/c 20 MeV 0.33 ns 80 MeV/u 0.4 c 5 fm/c 40 MeV 0.16 ns

Tracking requirements for low energy beams (5-20 MeV/u) Angular resolution: 0.5º-1º Timing: 0.7-0.3 ns

Transverse momentum resolution pT = m v q