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[en] A major aspect in the design and construction of cooling or electron storage rings is the beam optics of the system, i.e. the arrangement of magnets, which can be varied according to the experimental objectives pursued by users. The magnitude of the oscillation amplitudes in the two transverse planes is an important criterion. Special care is to be taken to appropriately build the internal targets in cooling rings, and the wigglers or undulators in the storage rings, respectively. The beam optics has to be selected in such a way that both the physical and the dynamic aperture will ensure good injection rates and long lifetimes. Selection of the dispersion function is of importance in two respects. It has to be properly dimensioned and restricted to low values with respect to the internal targets of the cooling ring, or the wigglers and undulators and the extraction septum, and on the other hand its effects on the longitudinal movement via the momentum compaction factor has to be taken into account. Too small a momentum compaction factor will lead to loss of longitudinal stability. It has an influence on the 'mixing', which is an important factor determining the performance of the stochastic cooling. (orig./CB)
Source
Sep 1995; 80 p; ISSN 0944-2952; 
; Available from TIB Hannover: RA 831(3120)
; Available from TIB Hannover: RA 831(3120)
[en] Short communication
Source
Ministerstvo Rossijskoj Federatsii po Atomnoj Ehnergii, Moscow (Russian Federation); Joint Inst. for Nuclear Research, Dubna (Russian Federation); 163 p; ISBN 5-85165-068-0; ; 1994; p. 161; IFVEh; Protvino (Russian Federation); 14. conference on charged particles accelerators; 14. soveshchanie po uskoritelyam zaryazhennykh chastits; Protvino (Russian Federation); 25-27 Oct 1994
; 1994; p. 161; IFVEh; Protvino (Russian Federation); 14. conference on charged particles accelerators; 14. soveshchanie po uskoritelyam zaryazhennykh chastits; Protvino (Russian Federation); 25-27 Oct 1994
[en] Published in summary form only
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195; ; CODEN VDPEA; v. 25(5); p. 1432
; CODEN VDPEA; v. 25(5); p. 1432
No abstract available
Source
Baur, G.; Buescher, M.; Filges, D.; Kilian, K.; Maier, R.; Rossen, P. von; Speth, J.; Stroeher, H. (Forschungszentrum Juelich GmbH (Germany). Inst. fuer Kernphysik); Freiesleben, H. (Technische Univ. Dresden (Germany)) (eds.); Forschungszentrum Juelich GmbH (Germany). Inst. fuer Kernphysik; Forschungszentrum Juelich GmbH (Germany). COSY Research; 313 p; ISSN 0944-2952; ; Mar 2002; p. 224-225; Available from TIB Hannover: RA 831(3978)
; Mar 2002; p. 224-225; Available from TIB Hannover: RA 831(3978)
[en] Since Cassen und Taylor and Stewart introduced 131iodine scans of the thyroid, these have become an integral part of the routine diagnostic procedures for thyroid disease. Today 131I is no longer used due to its excessive radioactivity; 123iodine or 99mtechnetium are now preferred. Pitfalls in the use of 99mTc are that in some thyroid disorders, such as certain forms of thyroid carcinomas and chronic thyroiditis, a normal iodine trapping (but not organification) may occur. This mechanism can lead to false conclusions. (orig.)
[de]
Seit der ersten szintigraphischen Abbildung der Schilddruese mit 131Jod durch Cassen bzw. Taylor und Stewart im Jahre 1951 ist die Schilddruesenszintigraphie Bestandteil der Routinediagnostik bei Schilddruesenerkrankungen. Allerdings wird heute aus Strahlenschutzgruenden nicht mehr 131Jod, sondern 123Jod und 99mTc verwendet. Die ''Pitfalls'' des 99mTc beruhen auf der Tatsache, dass einige Schilddruesenerkrankungen, wie bestimmte Formen der Schilddruesenkarzinome und der autoimmunthyreoiditis, noch eine Jodanraffung (jedoch nicht eine Organifizierung) aufweisen, die zu falschen Schlussfolgerungen fuehren koennen. (orig.)Journal
[en] The cooler synchrotron COSY, a synchrotron and storage ring for medium energy physics is being built at Juelich. The cooler ring will deliver protons in the momentum range from 270 to 3300 MeV/c. Details of the lattice, to match the different ion optical requirements for cooling, acceleration, internal experiments and ultra-slow extraction are discussed. An overview and a realization status of the ion sources, the injector cyclotron, the ring, the injection and extraction beamlines are given. (author) 7 refs.; 3 tabs
Source
Henke, H. (Technische Univ., Berlin (Germany). Inst. fuer Theoretische Elektrotechnik); Homeyer, H. (Hahn-Meitner-Institut Berlin GmbH (Germany)); Petit-Jean-Genaz, Ch. (eds.); [908 p.]; ISBN 2-86332-114-5; ; 1992; p. 149-151; Editions Frontieres; Paris (France); EPAC 92: 3. European particle accelerator conference; Berlin (Germany); 24-28 Mar 1992
; 1992; p. 149-151; Editions Frontieres; Paris (France); EPAC 92: 3. European particle accelerator conference; Berlin (Germany); 24-28 Mar 1992
[en] Published in summary form only
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195; ; CODEN VDPEA; v. 27(1); p. 57
; CODEN VDPEA; v. 27(1); p. 57
[en] The synchrotron and storage ring COSY-Juelich will deliver protons with energies between 50 and 2500 MeV, i.e. it comprises the whole range of interest for medical applications (approx. 60 to 250 MeV). In the early phase of operation it will be able to store 2x1010 protons and deliver a beam intensity of 5x108 protons/s. The initial beam intensity is already adequate to deposit a dose of 2 Gy in a tumor volume of 1 liter in 2-3 min. COSY-Juelich permits ultra slow beam extraction for easy beam scanning. Positioning of the beam should be better than ± 0.5 mm and energy variation from pulse to pulse better than 10-3. (R.P.) 1 ref.; 1 fig.; 1 tab
Source
Henke, H. (Technische Univ., Berlin (Germany). Inst. fuer Theoretische Elektrotechnik); Homeyer, H. (Hahn-Meitner-Institut Berlin GmbH (Germany)); Petit-Jean-Genaz, Ch. (eds.); [941 p.]; ISBN 2-86332-115-3; ; 1992; p. 1672-1673; Editions Frontieres; Paris (France); EPAC 92: 3. European particle accelerator conference; Berlin (Germany); 24-28 Mar 1992
; 1992; p. 1672-1673; Editions Frontieres; Paris (France); EPAC 92: 3. European particle accelerator conference; Berlin (Germany); 24-28 Mar 1992
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