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

2. 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

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

4. 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

5. Detector setup Detection set-ups: - E1 : DSSSD Si-40m.
E1 E2 E/ E 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
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

6. 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
Etotal /MeV
Etotal /MeV
E = E1+ E2
Detector resolution 2% (Si) 20 40 60 80
100
120
140
E /MeV 3)
19C
18C
18C
Etotal /MeV

7. 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
Etotal /MeV
Etotal /MeV 20 40 60 80
100
120
140 3) 3)
E /MeV
18C 3)
19C
High time resolution
needed SeD
Etotal /MeV

8. 11Be Elastic scattering + break-up20 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)
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
Etotal /MeV
Etotal /MeV

9. 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

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

11. Transverse momentum resolution
pT = m v q