No abstract

The behavior of standing wave accelerator tanks, made up of chains of resonant cavities, is investigated using a coupled resonator model. This model gives accurate predictions of the behavior of such a cavity chain, including tolerances to errors in manufacture, cavity feed distributions, and transient response. The parameters necessary in the theory, the cavity couplings, Q's, and frequencies, may easily be determined by experiment. Extension of the simple chain to a more complex chain with double periodicity and second nearest neighbor coupling is demonstrated. Advantages of operating such accelerators in the π/2 mode are shown.

The design and operation of resonant linear accelerator tanks suitable for use in high energy proton and electron linacs is described. It is shown that construction of these tanks to operate in the π/2 mode yields systems with extraordinary field stability. Theoretical expressions and corresponding experimental observations are obtained for the behavior of cavity chains operating in the π/2 mode. The synthesis of the side coupled cavity chain, a biperiodic chain which combines high acceleration efficiency with π/2 mode field stability, is described. Extensions of π/2 mode operation to nonperiodic chains is also demonstrated.

Alde D. et al. Study of the π o π o-system with the GAMS-4000 spectrometer at 100 GeV/c: IHEP Preprint 98-23.-Protvino, 1998.-p. 24, figs. 11, refs.: 25. The π o π o-system produced in the charge exchange π − p-reaction at 100 GeV/c has been studied. The experiment was performed at the CERN SPS accelerator with the multiphoton hodoscope spectrometer GAMS-4000. A partial wave analysis was carried out in the mass range from 0.8 GeV to 3.0 GeV at −t < 0.2 (GeV/c) 2 with the S, D, G and J waves. The S-wave exhibited rather complicated behaviour with a series of four bumps separated by three dips, at 1 GeV, 1.5 GeV and 2 GeV, which give the evidence for several scalar resonances. Clear peaks corresponding to the f 2 (1270), f 4 (2050) and f 6 (2510) mesons were seen in the higher waves. All the three mesons were produced via a dominating one pion t-channel exchange. The parameters and production cross sections of these mesons were measured. aNNOTACIQ aLDI d. I DR. iZUˆENIE π o π o-SISTEMY NA SPEKTROMETRE gams-4000 PRI IMPULXSE 100 g"w/S: pREPRINT ifw-98-23.-pROTWINO, 1998.-24 S., 11 RIS., BIBLIOGR.: 25. iZUˆENA π o π o-SISTEMA, OBRAZU@]AQSQ W ZARQDOWOOBMENNOJ π − p-REAKCII PRI IMPULX-SE 100 g"w/S.-KSPERIMENT WYPOLNEN NA USKORITELE sps cern. dLQ REGISTRACII γ-KWANTOW OT RASPADOW π o-MEZONOW ISPOLXZOWALSQ GODOSKOPIˆESKIJ MNOGOFOTONNYJ SPEKTRO-METR gams-4000. pARCIALXNO-WOLNOWOJ ANALIZ π o π o-SISTEMY PROWEDEN W INTERWALE MASS OT 0,8 DO 3 g"w S UˆETOM S−, D−, G− I J-WOLN. S−WOLNA IMEET WESXMA SLOVNU@ STRUK-TURU, W NEJ NABL@DAETSQ SERIQ IZˆETYREH BAMPOW, RAZDELENNYH TREMQ PROWALAMI, OKOLO 1, 1,5 I 2 g"w, KOTORYE UKAZYWA@T NA SU]ESTWOWANIE NESKOLXKIH SKALQRNYH REZONANSOW. w WYS[IH WOLNAH NABL@DA@TSQˆETKIE PIKI, SOOTWETSTWU@]IE f 2 (1270)-, f 4 (2050)-I f 6 (2510)-MEZONAM. wSE TRI MEZONA OBRAZU@TSQ PUTEM DOMINIRU@]EGO ODNOPIONNOGO OBMENA. iZME-RENY IH PARAMETRY I SEˆENIQ OBRAZOWANIQ.

Agricultural income volatility has become a major hurdle for Irish farmers and policymakers to overcome in their drive to increase investment, production and ultimately income in the sector. This paper studies data from 927 farms in the Teagasc National Farm Survey between 2005 and 2013, the first 9 years of the decoupled subsidy era. The primary income support for European farmers, the single farm payment (SFP), is analysed in the context of its relationship with market income risk, i.e. farm income excluding subsidies. Detrended measures of market income variability are regressed on a large set of control variables. The findings suggest that the amount of SFP received by farmers has a strong and statistically significant relationship with agricultural income volatility.