Fastbeam RISING campaign (H.J. Wollersheim)

RISING using relativistic ion beams

Experiments at 100 MeV/u (beam velocity b=v/c=0.43)

Experimental setup for 100 MeV/u at S4
Cluster / Miniball / HECTOR set-up:

Design paper for the Ge-array (October 2002)
RISING cluster detector angles
HECTOR in RISING
RISING with Miniball Design Status (19.1.2004)
RISING with Miniball Design Status (28.7.2004)
Exp. details of fast beam experiments
Relativistic Coulomb excitation
Summary of fast beam experiments

Targets available for RISING
Technical drawings
Photo sampler

S4 beamline:

Technical drawing of S4-beamline (JPEG) (PDF)
Technical drawing of S4-beamline and HECTOR array (PDF)
S4-beamline (photo)
S4 secondary target chamber (photo)

SC41 scintillator:

Plastic scintillator for RISING experiments
SC41-report (N. Saito)

CAlorimeter TElescope array (CATE):

CATE Homepage

CATE array
Si array
Si-detector
Si-detector motherboard
Pulse height estimation for Si detector

Si-detector manual CANBERRA/EURISYS
Low Voltage:+/-12V
Nominal High Voltage:+30V
Preamplifier connection(TU-Darmstadt)

CsI array
CsI(Tl)+PIN diode readout
PCB Detector-PCB-Flange
CATE chamber

CsI-detector manual SCIONIX
Low Voltage:+/-12V
Nominal High Voltage:+30V
Board connection
Preamplifier connection(Milano & Darmstadt)

CATE's data sheet in RISING experiments

Posters about CATE EMIS-2002 DPG-2003

Experimental details:

Beam spot size at secondary target
Determination of the scattering angle
Beam velocity b and g-parameter

For beam energy T/A₁ = MeV/u
the beam velocity is β = γ =

Grazing angle (lab-system)

For projectiles with mass/element number A₁ = Z₁ =
and target nuclei with mass/element number A₂ = Z₂ =
at a beam energy T/A₁ = MeV/u
the grazing angle is ϑ_gr(lab) = mrad

more details
grazing angle (lab)=31.4 mrad for ⁷⁸Ni on ²⁰⁸Pb
grazing angle (lab)=31.2 mrad for ¹³²Sn on ²⁰⁸Pb

secondary target thickness and angular straggling

Ni (100 MeV/u) → Pb-target: Range = 1.30 g/cm²
Sn (100 MeV/u) → Pb-target: Range = 0.94 g/cm²
ATIMA

max. theo. luminosity=1.2*10²⁵ (s^-1cm^-2)
for 10⁴ secondary particles/s (MUSIC) and a Pb-target of 0.4 g/cm²

¹⁹⁷Au (386mg/cm²) --> 1.2*10²¹ target atoms/cm²
⁹Be (702mg/cm²) --> 4.7*10²² target atoms/cm²

Coulomb excitation cross sections (examples)
rate estimate for relativistic Coulomb excitation

Atomic background radiation:

g-absorbers: (suppression of atomic background radiation)

used absorbers in front of Ge-detectors:
1mm (Pb), 2mm (Sn), 2mm (Al as supporting structure)

Additional g-ray background sources:

HECTOR at RISING (pdf)

BaF time spectra (at the beginning)

New Pb-brick wall upstream of the BaF HECTOR array
Pb-brick wall (suppression of gamma radiation from upstream)

BaF time spectra with the new Pb-brick wall

BaF time spectra for different energy deposit in MUSIC

HECTOR time gated by HECTOR energy

Conclusions: differnt sources on the background g-radiation

CATE a source for g-ray background:

g-detection system HECTOR (pdf)

³⁷Ca -> ^36,37Ca versus ³⁷Ca -> ³⁶K

³⁷Ca -> ^36,37Ca (elastic + xn-channels)

³⁷Ca -> ^36,37Ca (g-angle dependence)

³⁷Ca -> ³⁶K (1p channel)

Doppler Effect:

⁸⁴Kr → ¹⁹⁷Au at 113 AMeV, Coulomb excitation
Finding the right velocity β

Particle-g-Ray Angular Correlation:

last update: 10.1.2006 Hans-Juergen Wollersheim HJW

	S4 beamline:
	Technical drawing of S4-beamline (JPEG) (PDF) Technical drawing of S4-beamline and HECTOR array (PDF) S4-beamline (photo) S4 secondary target chamber (photo)

	SC41 scintillator:
	Plastic scintillator for RISING experiments SC41-report (N. Saito)

	Doppler Effect:
	⁸⁴Kr → ¹⁹⁷Au at 113 AMeV, Coulomb excitation Finding the right velocity β