New GSI Analysis System GO4  

Participants: H. Essel, P. Koczon, N. Kurz, M. Richter, K. Schmidt, E. Stiel, H. Winter

Distribution: R. Barth, H. Brand, P. Braun-Munzinger, W. Brüchle, S. Glückert, H. Göringer, N. Herrmann, S. Hofmann, R. Holzmann, M. Kaspar, H. J. Kluge, W. Koenig, C. Kozhuharov, U. Krause, U. Lynen, P. Malzacher, V. Metag, W.F.J. Müller, G. Münzenberg, V. Schaa, C. Scheidenberger, C. Schlegel, K.H. Schmidt, H. J. Specht, R. Steiner, K. Sümmerer, Juha Äyastö (Jyväskylä), G. Bollen (ISOLDE), R. Fox (MSU), E. Grosse (FZR), Th. Nilsson (ISOLDE), M. Schlett (FZR), H. Simon (ISOLDE), K. Suzuki (Niigata), Ken Teh (ANL), Piet Van Duppen (Louvain-la-Neuve)

The Fragment Separator (FRS) is a high-resolution magnetic spectrometer, designed for the production and separation of secondary, pure beams of exotic nuclei (http://www.gsi.de/~frs/home.html). These beams can be analyzed in experiments located directly at the FRS or in Cave B or they can be stored in the Experimental Storage Ring, ESR, for further experiments.

The experimental setup:

• identical detectors for controlling the beam transport through the separator (Multi-Wire Chambers, Current Grids or Ionization Chambers) and at the experiment Cave
• the number of parameters is limited to about 400
• 2 - 4 CAMAC crates
• 1 VME crate using 3 Eltec E7 VME processor boards and VSB mapped CAMAC readout controllers (CBV). The MBS system is used for read-out.
• on-line data analysis with GOOSY standard programs and sometimes with PAW.
• setting and storing of calibration parameters
• simple parameter correlations
• simple arithmetic
• high throughput
• immediate event display (memory mapped i/o buffers)
• scatter plots
• polygon conditions
• indexed spectra
• indexed conditions
• 8k spectra size for Gamma spectroscopy
• direct memory increment (DMI) hardware in CAMAC seamlessly integrated in the analysis system
• import/export of spectra

Requirements for a new analysis system:

• simple user interface
• simple and fast learnable (1 day)
• independent from specific operating systems
• free definable fit functions (Gamma spectroscopy)
• commonly used programming language
• simply extendable (OO-like inheritance)
• high throughput for on-line analysis
• seamless integration of accelerator parameters into the event stream
• simple interface to graphic packages like Origin
• publication-ready graphic tools

After the talk a discussion about general requirements and realization problems took place.

M. Richter, October 8, 1998

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Last update: 27-11-13.