Figure 2 - uploaded by Victor Smaluk
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Spectral response of PMT (1, blue) and CCD camera (2, red). Arrows indicate wavelength of luminescence maximum of the studied materials. Figure 2 represents spectral sensitivity of these devices. The beam diameter was cut down to 4 mm by lead collimator. Typical beam image from the CCD camera is presented in Fig. 3.
Source publication
Fluorescent screens are widely used for single-pass measurements of transverse beam profile at most of accelerator facilities. Great number of materials is now used for manufacture of fluorescent screens. The linearity, sensitivity and spatial resolution of the diagnostics depend on the choice of screen substance. We made an attempt to compare a li...
Citations
... Typical resolution of the screen is about 50 μm. Absolute light yield calibration of the YAG:Ce screen has been done in BINP [3] using a 350-MeV electron beam of about 7·10 5 particles (0.1 pC). ...
For the NSLS-II third generation light source, a full-energy Booster ring has been designed and produced by Budker Institute of Nuclear Physics. For the Booster commissioning and operation, following beam diagnostic instruments have been designed and manufactured: 6 beam flags, 36 electrostatic pickups with BPM receivers, 2 synchrotron light monitors (SLMs), 1 DC current transformer, 1 fast current transformer, Tune Measurement System (TMS) including 2 strip-line assemblies. All the equipment has been installed in the Booster ring and Injector Service Area. Control software of the beam diagnostic devices has been developed and incorporated into the NSLS-II control system using the EPICS environment. A number of high-level applications has been developed using Control System Studio and Python. The Integrated Testing and the System Level Testing have been performed. Current status of the Booster beam diagnostic instrumentation is reviewed.
... The first type of luminophors is linear up to beam densities of 10 13 particle/cm 2 [4], but these data are pertinent to electrons with energy of sev eral keV. The measurements taken for the relativistic energy range [6] yield values no less than 10 11 e -/cm 2 (see Figs. 3 and 4), which is quite sufficient in the major ity of practically important cases. The threshold sensitiv ity of luminophors is approximately 10 7 particle/cm 2 . ...
Optical diagnostics are widely used both at experiments of plasma physics and for measurements of parameters of electron/positron beams in accelerators. The approaches, applied for that, often have the same methodological basement which is explained by similarity of properties of the studied phenomena. Nevertheless, these branches of physics are very speciˇc and demand a special diagnostics. Possibility of closed contacts and cooperation between scientists solving similar problems at different areas of physics promotes to overcome these problems. It is especially typical for BINP SB RAS known by pioneering works at electronÄpositron colliders and nuclear fusion. The first part of the article contains a review of optical diagnostics that are recognized tools at colliders and storage rings. The second part describes the diagnostics that are used at the experiments of plasma heating by high-current electron beam.
Оптические диагностики широко используются и в экспериментах по физике плазмы, и для измерений параметров электронных и позитронных пучков в ускорителях. При этом зачастую применяются «идеологически» идентичные подходы, что объясняется совпадением некоторых свойств изучаемых объектов, несмотря на то, что эти разделы физики совершенно специфичны и требуют применения специализированных методик. Возможность тесного общения ученых, решающих схожие проблемы в различных областях науки, способствует плодотворному обмену идеями и помогает эти проблемы преодолевать. Это особенно характерно для ИЯФ им.Г.И.Будкера СО РАН, известного своими пионерскими работами в области электрон-позитронных коллайдеров и управляемого термоядерного синтеза. В разд.1 дан обзор оптических диагностик стационарных параметров пучка в циклических ускорителях электронов и позитронов. Рассмотрены лишь те методики, которые стали признанным инструментарием на коллайдерах и накопительных кольцах последнего поколения и без которых рутинную эксплуатацию установки сложно представить. В разд.2 описаны диагностики, используемые в экспериментах по нагреву плазмы мощным электронным пучком.
