Stuttgart Dynamitron at Bucharest - Perspectives

and New Activities

Dr. Cristina Bordeanu

Nuclear Astrophysics measurements requirements

• Low energies• Energy stability• Very low cross sections• Long time measurements• High beam intensity• Low gamma background• Special detectors• High precision measurement plans

MINING FOR KNOWLEDGE

CONNECTING FUNDAMENTAL PHYSICS

TO THE COSMOS

LUNA

Gran Sasso

LUNA site

LUNA 1(1992-2001)

50 kV

LUNA 2(2000…)

400 kV

LLaboratory foraboratory for UUndergroundnderground

NNuclear uclear AAstrophysicsstrophysics

Radiation

LNGS/surface

MuonsNeutron

s

10-6

10-3

LNGS(shielding 4000 m w.e.)

“We are made of star dust” Carl Sagan

Why underground?

Underground Astrophysics in Romania

Contact people

• Prof. Claus Rolfs –Ruhr University• Prof. Wiescher -Notre Damme University• Prof. Hammer - Notre Damme University• Prof. Michler –Stuttgart• Prof. Pitz - Stuttgart• Prof. Hollick - Stuttgart

4.3MV max voltage1mA heavy ions4mA electronslength 7 mdiameter 2.6 m

The side portcontaining the coilsdiameter of ca. 2mthickness 1.5 m

Accelerating tube ca. 5.4 m long + ca. 1 m the high voltage terminal

ca. 6 bar SF6

ca. 1.7 tons of SF6

The power unit2 m*2 m*2 m200 kW

Sources & extraction system PEABODY SCIENTIFIC.

Gas handlingSystem (part)

Achievements at Stuttgart

Dynamitron mentenance1997 0.5%1998 0.5%1999 2.1%2000 14.6%2001 13.9%2002 2.3%2003 -----

Stuttgart experimental area

• 00 - -radiation control system• 210 - heavy ion -beam scanner• 600 - (,) -security system• 900 - windowless gas target -Photoactivation• 1200- bremsstralung -Nuclear Astrophysics• Irradiation -Nucl.Resonance

Fluores.• -Irradiations

What we may get

• Motif to stop the accelerator• No ion source• Radioactivity level• SF6 system and gas• Spare parts• change several sealings, delrin rods• Regenerate the accelerating tube• Bought parts must be rectified at the

mechanical shop

Duoplasmatron Peabody ScientificModel PS-100

PROJECT• Where to place it• Money for the whole operation• Mechanical workshop• Spare-parts• Manpower• Power• Patience• High interest in experimental nuclear

physics subjects and material applications

STEP IN