Heather Hogg

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  • K. E. Breymayer, Kevin Crook, +7 authors D. D. Reagan
  • 2006
Early in the history of SLAC, it was decided that the injector, the alignment system, and the beam switchyard should be developed as independent units. As a result, they are but weakly integrated with the instrumentation and control systems for the rest of the machine. They are discussed in detail in other chapters. Instrumentation and control (I & C)(More)
A novel series of indole/indazole-aminopyrimidines was designed and synthesized with an aim to achieve optimal potency and selectivity for the c-Jun kinase family or JNKs. Structure guided design was used to optimize the series resulting in a significant potency improvement. The best compound (17) has IC50 of 3 nM for JNK1 and 20 nM for JNK2, with greater(More)
This paper surveys current and planned research and development at SLAC on superconducting linear accelerators 0 Ultimately, the goal is to convert the present machine to a two-mile 100 GeV superconducting linac. The technological problems which stand in the way of this achievement are being attacked on two fronts: on the one hand, a better understanding of(More)
The first observation of beam break-up at SLAC was made on April 27, 1966, one week after the beam was first turned on over two-thirds of the accelerator’s two-mile length. I The event caused more astonishment than panic because the observed beam break-up current threshold of 10 to 20 mA peak, while much lower than in other shorter accelerators, was not far(More)
From the following description, it will be seen that SLED raises the accelerator peak energy by 40% if the present 2.7 1s RF pulse length is used. The energy increase ” is 80% if the pulse length is extended to 5 ps. TO do this, however, changes have to be made in the modulators and trigger system, and the maximum repetition rate has to be halved to(More)
The function of the phasing system is to adjust the phases of the 245 klystrons so that the energy of the accelerated electron beam is maximized and the energy spectrum width is held to a minimum. To achieve this, the design objective of the automatic phasing system was to make the crests of the RF traveling wave in the accelerator coincide with the(More)
Introduction The purpose of this paper is to review the progress that has been made in the last six months in understanding and remedying the beam break-up effect (BBU) at SLAC. No attempt will be made to give a comprehensive summary of earlier work on this subject published elsewhere. 1,2,3,4 As described in these references , the BBU effect observed and(More)
The purpose of this paper is to describe recent developments at SLAC which have contributed to improvements in beam operation. The paper will be divided into two parts. The first will summarize overall beam performance and operational efficiency in delivering beams to various experiments. The second will be devoted to specific developments such as the(More)