122880341
Search for a double-pomeron-exchange contribution in the reaction K-p --> K-(pi-pi+)p at 14.3 GeV/c
120061510
Measurement of wide-angle elastic scattering of pions and protons off protons
A comprehensive measurement of the differential cross section for ..pi../sup + -/p and pp elastic scattering has been made at large center-of-mass angles. ..pi../sup -/p and pp scattering were measured with incident laboratory momenta ranging from 2 to 9.5 GeV/c. ..pi../sup +/p scattering was measured with momenta from 2 to 6.3 GeV/c. Scattering angles were in the range -0.3 < or approx. = costheta/sub c.m./ < or approx. = 0.4. The results of the experiment are compared to constituent models and statistical models.
107450647
Hodoscope subgroup summary microchannel plate photodetectors
A brief discussion is given of the possible uses of microchannel plate photomultipliers and multichannel or multianode photodetectors at ISABELLE.
117016085
Inclusive production of lambda and neutral kaon in K−p interactions at 3.93 GeV/c and 14.3 GeV/c
SummaryLambda and neutral-kaon production is studied in K−p interactions at 3.93 and 14.3 GeV/c. Topological inclusive cross-sections are given at both energies. Invariant cross-sections for lambdas and neutral kaons are presented as a function of the Feynmanx-variable and are found to decrease in magnitude and vary their shapes with energy. The

$$AK\overline K $$

 production, which represents (9±2)% and (29±3)% of the lambda inclusive cross-section at 3.93 GeV/c and 14.3 GeV/c respectively, yields mainly backward lambdas. The shapes of the transverse-momentum invariant distributions vary withx, but are roughly independent of energy. The lambda polarization is studied as a function ofx at both incident momenta: for fast lambdas it is negative, as observed in reactions where nucleon exchange is dominant.RiassuntoSi studia la produzione di particelle lambda e di kaoni neutri nelle interazioni K−p a 3.93 e 14.3 GeV/c. Per entrambi i valori dell'energia si danno le sezioni d'urto inclusive topologiche. Si presentano le sezioni d'urto invarianti per particelle lambda e kaoni neutri in funzione della variabilex di Feynman e si trova che diminuiscono in grandezza e cambiano di forma con l'energia. La produzione di

$$AK\overline K $$

, che rappresenta il (9±2)% e il (29±3)% della sezione d'urto inclusiva delle particelle lambda rispettivamente a 3.93 GeV/c e 14.3 GeV/c, dà per lo più particelle lambda che vanno all'indietro. Gli andamenti delle distribuzioni invarianti dell'impulso trasversale variano conx, ma sono approssimativamente indipendenti dall'energia. Si studia la polarizzazione delle particelle lambda in funzione dix per entrambi i valori dell'impulso incidente: per particelle lambda veloci è negativa, come si è osservato in reazioni in cui predomina lo scambio di nucleoni.РезюмеИсследуется рождение ламбда и нейтрального каона в K−p взаимодействиях при 3.93 ГэВ/с и 14.3 ГэВ/с. При обеих энергиях приводятся топологические инклюзивные поперечные сечения. Инвариантные поперечные сечения для ламбда и нейтральных каонов представлены в виде функции фейнмановскойx переменной. Получено, что поперечные сечения уменьшаются по величине и изменяют свою форму с энергией.

$$AK\overline K $$

 рождение, которое составляет соответственно (9±2)% и (29±3)% ламбда инклюзивного поперечного сечения при 3.93 ГэВ/с и 14.3 ГэВ/с, образует в основном ламбда-частицы, летящие в обратном направлении. Формы инвариантных распределений для поперечного импульса изменяются с «x», но вгрубом приближении не зависят от энергии. Исследуется поляризация ламбда, как функцияx для обоих начальных испульсов: для быстрых ламбда-частиц поляризация отрицательная, как наблюдается в реакциях, где доминирует нуклонный обмен.
125547556
A NUMERICAL and ANALYTICAL STUDY OF ANOMALOUS PROPAGATION OF ELECTRICAL IMPULSES IN DAMAGED HEART FIBERS
· .
120089999
Two-body final states in K-p interactions at 14.3 GeV/c
Event selection and weighting. In Fig. 1 a), the distribution of the square of the missing mass to the K0 in all zero-prong plus one K ~ events is displayed; a clear neutron signal is visible with a half-width of approximately 0.4 (GeV)L In the study of reaction (1) we use all events with missing mass less than the A(1236) mass. The cross-section is corrected for the few neutron events above this cut by double-counting the symmetrical region below the neutron mass. We also correct for the background reaction
356864
Design and performance of the traveling-wave beam chopper for the SSRL injector
A pulsed, split-parallel plate chopper has been designed, built, and installed as part of the preinjector of the Stanford Synchrotron Radiation Laboratory (SSRL) injector. Its function is to allow into the linear accelerator (linac) three consecutive S-band bunches from the long bunch train provided by an RF gun. A permanent magnet deflector (PMD) at the chopper entrance deflects the beam into an absorber when the chopper pulse is off. The beam is swept across a pair of slits at the beam output end when a 7 kV, 10 ns rise-time pulse passes in the opposite direction through the 75 Omega stripline formed by the deflecting plates. Bunches exiting the slits have their trajectories corrected by another PMD, and enter the linac. Beam tests demonstrate that the chopper functions as expected.<<ETX>>
738055
The linac and booster RF systems for a dedicated injector for SPEAR
A 120 MeV, 2856 MHz, traveling wave linear accelerator (linac), with a microwave gun, alpha magnet, and chopper, has been built at the Stanford Synchrotron Radiation Laboratory (SSRL) as a preinjector for and along with a 3 GeV, 358.54 MHz, booster synchrotron ring. The resulting injector will be available on demand to fill the Stanford Positron-Electron Accelerator Ring (SPEAR), which is a storage ring now dedicated to synchrotron light production. A description is given of the injector's two separate and different frequency RF systems. Synchronization of the two, non-harmonic systems is achieved through the linac's chopper. Some of the interesting mechanical and electrical details are discussed and the operating characteristics of the linac and ring RF are highlighted.<<ETX>>
135471827
344 cm x 86 cm low mass vacuum window
The LBL Heavy Ion Spectrometer System (HISS) superconducting magnet contains a 1 m x 3.45 m x 2 m vacuum tank in its gap. A full aperture thin window was needed to minimize background as the products of nuclear collisions move from upstream targets to downstream detectors. Six windows were built and tested in the development process. The final window's unsupported area is 3m/sup 2/ with a 25 cm inward deflection. The design consists of a .11 mm Nylon/aluminum/polypropylene laminate as a gas seal and .55 mm woven aramid fiber for strength. Total mass is 80 milligrams per cm/sup 2/. Development depended heavily on past experience and testing. Safety considerations are discussed.
16907914
Higher Dipole Bands in the NLC Accelerating Structure
The authors show that scattering matrix calculations for dipole modes between 23--43 GHz for the 206 cell detuned structure (DS) are consistent with finite element calculations and results of the uncoupled model. In particular, the rms sum wake for these bands is comparable to that of the first dipole band. They also show that for RDDS1 uncoupled wakefield calculations for higher bands are consistent with measurements. In particular, a clear 26 GHz signal in the short range wake is found in both results.
28251345
Physics and Medicine: The Bevatron/Bevalac Experience, 1979-1980
Heavy ion radiobiology has been integrated successfully into the research program at the Bevatron/Bevalac for the past several years. During the 1979-1980 year radiotherapy trials have been conducted side-by-side with the demanding program of heavy ion nuclear science research at this national facility. Careful attention is given to the scheduling of research on the SuperHILAC and Bevatron/Bevalac so that the nuclear science and biomedical programs at the Bevatron/Bevalac and the program at the SuperHILAC are served to maximum effect. Efforts to maximize the researchers' time have resulted in hardware, software, and operating improvements that offer a total machine availability of about 90% and a user availability of about 80%. Fast beam switching and beam sharing permit virtually simultaneous use of the Bevatron/Bevalac by two or more users. Current beam delivery systems will be augmented in FY81 to provide two ion energies per Bevatron/Bevalac pulse.