Conceptual Design of the Argonne 6-GeV Synchrotron Light Source
The Argonne National Laboratory Synchrotron Light Source Storage Ring is designed to have a natural emittance of 6.5 × 10-9 m for circulating 6-GeV positrons. Thirty of the 32 long straight sections, each 6.5-m long, will be available for synchrotron light insertion devices. A circulating positron current of 300 mA can be injected in about 8 min. from a booster synchrotron operating with a repetition time of 1.2 sec. The booster synchrotron will contain two different rf systems. The lower frequency system (38.97 MHz) will accept positrons from a 360-MeV linac and will accelerate them to 2.25 GeV. The higher frequency system (350.76 MHz) will accelerate the positrons to 6 GeV. The positrons will be produced from a 300-MeV electron beam on a tungsten target. A conceptual layout is shown in Fig. 1. Related papers on the Argonne Synchrotron Light Source may be found in references 1-3.
Storage rings, internal targets and PEP
_ " Most of the talks here will be on physics from accelerators and storage rings rather than the physics of such systems since the " physics " is hard enough without having to worry about the beams or how you get them. As a result, this remains transparent to the user via an equipartition of effort worthy of a business school. This is especially debatable for colliding beam storage rings and leads to the corollary that most rings will be born, live and die as dedicated systems. SPEAR is a notable exception while PEP is not-even though PEP seems to provide more unique opportunities over a broader spectrum of physics. Examples include one and two photon physics with real and virtual photons to make all Jpc quark combinations as well as high luminosity QCD confinement studies with internal targets as discussed at this workshop. Some related possibilities include external beams of high energy photons; single-pass, free-electron lasers and x-ray synchrotron radiation which could all be the highest energy, resolving power, intensity and brilliance anywhere. From the viewpoint of accelerator physics, such examples fall into three categories: colliding beam physics, internal and external target physics. How unique such possibilities are, whether they are truly possible e.g. what modifications might be required and questions of compatibility are discussed. Some systematic accelerator physics studies are suggested with implications for this and other proposed projects. As a fan of Gary Larson, I begin with Fig.1 showing his perspective of the PEP tunnel relevant to this occasion. Figure 2 is about reinventing the wheel(or ring in this case) with a lot of people trying to figure out what it is and how you use it. While one can't be sure what they'll come up with it's certain to be " interesting ". However, because there have been several proposals for dedicated rings with properties which seem no better than PEP, perhaps Evelyn Waugh should have the last word here: " Ifpoliticians and scientists were lazier, how much happier we should all be. " .I. Introduction The goal is to describe storage rings with internal targets using PEP as example. Although fixed-target experiments were suggested some twenty-five years ago' little work of this kind has been done2. The differences between electrons and heavier particles such as protons, antiprotons or heavy ions is significant and is also discussed because it raises possibilities of bypass insertiqns for …
Lupin alkaloids from teratogenic and nonteratogenic lupins. II. Identification of the major alkaloids by tandem gas chromatography-mass spectrometry in plants producing crooked calf disease.
The major alkaloids of lupin plants producing crooked calf disease were identified by tandem gas chromatography-mass spectrometry and infrared analysis. The gas chromatography peak invariably present in teratogenic plants proved to be anagyrine. A minor but irregular contaminant of the peak was α-isolupanine. Other alkaloids present but apparently not associated with crooked calf disease were lupanine and two others that were probably epimethoxylupanine and 5,6-dehydrolupanine.