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Atomic electron motion for MΓΈller polarimetry in a double-arm mode
We analyse an effect of electron Fermi motion at atomic shells on the accuracy of electron beam polarization measurements with a M\"oller polarimeter operating in a double--arm mode. It is demonstrated that the effect can result in either {\it increase} or {\it decrease} of the measured polarization depending on the detector positions. The effect is simulated for the M\"oller polarimeter to be installed at CEBAF Hall A
Energy Calibration of the JLab Bremsstrahlung Tagging System
In this report, we present the energy calibration of the Hall B
bremsstrahlung tagging system at the Thomas Jefferson National Accelerator
Facility. The calibration was performed using a magnetic pair spectrometer. The
tagged photon energy spectrum was measured in coincidence with pairs
as a function of the pair spectrometer magnetic field. Taking advantage of the
internal linearity of the pair spectrometer, the energy of the tagging system
was calibrated at the level of . The absolute energy scale
was determined using the rate measurements close to the end-point of
the photon spectrum. The energy variations across the full tagging range were
found to be MeV.Comment: 15 pages, 12 figure
Millimeter-wave study of London penetration depth temperature dependence in Ba(Fe0.926Co0.074)2As2 single crystal
In-plane surface Ka-band microwave impedance of optimally doped single
crystals of the Fe-based superconductor Ba(Fe0.926Co0.074)2As2 (Tc= 22.8K) was
measured. Sensitive sapphire disk quasi-optical resonator with high-Tc cuprate
conducting endplates was developed specially for Fe-pnictide superconductors.
It allowed finding temperature variation of London penetration depth in a form
of power law, namely \Delta \lambda (T)~ Tn with n = 2.8 from low temperatures
up to at least 0.6Tc consisted with radio-frequency measurements. This exponent
points towards nodeless state with pairbreaking scattering, which can support
one of the extended s-pairing symmetries. The dependence \lambda(T) at low
temperatures is well described by one superconducting small-gap (\Delta \cong
0.75 in kTc units, where k is Boltzman coefficient) exponential dependence.Comment: 6 pages, 2 figures, to be published in Low Temperature
Physics,vol.37, August 201
Visual Inspection of Chimney Pipes Using Quadro-Copters
Π‘Π΅ΠΊΡΠΈΡ II : Π‘ΡΡΠΎΠΈΡΠ΅Π»ΡΠ½ΡΠ΅ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ Π·Π΄Π°Π½ΠΈΠΉ ΠΈ ΡΠΎΠΎΡΡΠΆΠ΅Π½ΠΈΠΉ, ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠ΅ ΠΌΠ΅ΡΠΎΠ΄Ρ ΡΠ°ΡΡΠ΅ΡΠ° ΠΈ ΠΏΡΠΎΠ΅ΠΊΡΠΈΡΠΎΠ²Π°Π½ΠΈΡΠ’ΡΠ°Π΄ΠΈΡΠΈΠΎΠ½Π½ΠΎ Π²ΠΈΠ·ΡΠ°Π»ΡΠ½ΠΎΠ΅ ΠΎΠ±ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π΄ΡΠΌΠΎΠ²ΡΡ
ΡΡΡΠ± ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΡΡ Π°Π»ΡΠΏΠΈΠ½ΠΈΡΡΠ°ΠΌΠΈ, ΡΠΏΠ΅ΡΠΈΠ°Π»ΠΈΠ·ΠΈΡΡΡΡΠΈΠΌΠΈΡΡ Π½Π° ΠΎΠ±ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡΡ
ΠΈ ΠΌΠ΅Π»ΠΊΠΈΡ
ΡΠ΅ΠΌΠΎΠ½ΡΠ°Ρ
ΠΏΡΠΎΠΌΡΡΠ»Π΅Π½Π½ΡΡ
ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ². ΠΠ΄Π½Π°ΠΊΠΎ ΡΡΠ° ΠΏΡΠ°ΠΊΡΠΈΠΊΠ° ΠΈΠΌΠ΅Π΅Ρ ΡΡΠ΄ Π½Π΅Π΄ΠΎΡΡΠ°ΡΠΊΠΎΠ², ΡΠ°ΠΊΠΈΡ
ΠΊΠ°ΠΊ Π²ΡΡΠΎΠΊΠ°Ρ ΡΡΠΎΠΈΠΌΠΎΡΡΡ ΡΠ°Π±ΠΎΡ, Π±ΠΎΠ»ΡΡΠ°Ρ Π΄Π»ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΡ ΠΏΡΠΎΡΠ΅ΡΡΠ°, Π½Π΅Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½Π°Ρ ΠΊΠΎΠ½ΠΊΡΠ΅ΡΠΈΠ·Π°ΡΠΈΡ ΠΊΠΎΠΎΡΠ΄ΠΈΠ½Π°Ρ ΠΌΠ΅ΡΡΠΎΠ½Π°Ρ
ΠΎΠΆΠ΄Π΅Π½ΠΈΡ ΠΏΠΎΠ²ΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠΉ ΠΈ Π½Π΅Π΄ΠΎΡΡΠ°ΡΠΎΡΠ½Π°Ρ ΡΠΎΡΠ½ΠΎΡΡΡ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π³Π΅ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΠΏΠΎΠ²ΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠΉ. ΠΡΠ΅Π΄-Π»ΠΎΠΆΠ΅Π½ ΠΌΠ΅ΡΠΎΠ΄ Π²ΠΈΠ·ΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΠ±ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π΄ΡΠΌΠΎΠ²ΡΡ
ΡΡΡΠ± ΠΏΡΠΈ ΠΏΠΎΠΌΠΎΡΠΈ ΠΊΠ²Π°Π΄ΡΠΎΠΊΠΎΠΏΡΠ΅ΡΠΎΠ², ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡΠΈΠΉ ΡΠ΄Π΅ΡΠ΅Π²ΠΈΡΡ ΠΈ ΡΡΠΊΠΎΡΠΈΡΡ ΠΏΡΠΎΡΠ΅ΡΡ, Π° ΡΠ°ΠΊΠΆΠ΅ Π²ΠΏΠ΅ΡΠ²ΡΠ΅ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΠΈΡΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π½ΡΠΉ ΠΌΠ΅ΡΠΎΠ΄ Β«determination of color densityΒ» Π΄Π»Ρ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ² ΡΠΎΡΠΎΡΡΠ΅ΠΌΠΊΠΈ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΡΡΠ΅Π½Ρ ΡΡΡΠ±Ρ, ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΠΌΠΎΠΉ Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΠΊΠ²Π°Π΄ΡΠΎΠΊΠΎΠΏΡΠ΅ΡΠ°.=Traditionally, visual inspection of chimneys is carried out by alpinists who specialize in surveys and minor repairs of industrial facilities. However, this practice has a number of disadvantages, such as the high cost of work, the long duration of the process, insufficient specification of the coordinates of the location of damage, and insufficient accuracy in determining the geometric characteristics of damage. A method of visual inspection of chimneys using quadrocopters is proposed, which makes it possible to reduce the cost and speed up the process, and for the first time it is proposed to apply the βgraiscaile color modelβ method for processing the results of photographing the surface of the chimney wall pro-duced by a quadrocopter
Using Heat Batteries for Electrical Systems Heat Supplies
Π‘Π΅ΠΊΡΠΈΡ V : ΠΠ½Π΅ΡΠ³ΠΎΡΠ΅ΡΡΡΡΠΎΡΠ±Π΅ΡΠ΅Π³Π°ΡΡΠΈΠ΅ ΠΈ ΠΏΡΠΈΡΠΎΠ΄ΠΎΠΎΡ
ΡΠ°Π½Π½ΡΠ΅ ΠΈΠ½Π½ΠΎΠ²Π°ΡΠΈΠΎΠ½Π½ΡΠ΅ ΡΠ΅ΡΠ΅Π½ΠΈΡ Π² ΠΈΠ½ΠΆΠ΅Π½Π΅ΡΠ½ΡΡ
ΡΠΈΡΡΠ΅ΠΌΠ°Ρ
Π·Π΄Π°Π½ΠΈΠΉ ΠΈ ΡΠΎΠΎΡΡΠΆΠ΅Π½ΠΈΠΉΠ ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Π° ΠΏΡΠΎΠ±Π»Π΅ΠΌΠ° Π²ΡΡΠ°Π²Π½ΠΈΠ²Π°Π½ΠΈΡ Π½ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ²Π°Π»Π° Π² ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠΈ ΡΠ»Π΅ΠΊΡΡΠΎΡΠ½Π΅ΡΠ³ΠΈΠΈ ΠΏΡΠΈ ΠΏΠΎΠΌΠΎΡΠΈ ΡΠ΅ΠΏΠ»ΠΎΠ°ΠΊΠΊΡΠΌΡΠ»ΡΡΠΈΠΎΠ½Π½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ ΡΠ΅ΠΏΠ»ΠΎΡΠ½Π°Π±ΠΆΠ΅Π½ΠΈΡ, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡΠΈΡ
ΡΠ»Π΅ΠΊΡΡΠΎΡΠ½Π΅ΡΠ³ΠΈΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° ΡΠ΅ΠΏΠ»ΠΎΡΡ. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Ρ ΡΠ΅ΡΠ΅Π½ΠΈΡ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠ΅ΠΏΠ»ΠΎΠ²ΡΡ
Π°ΠΊΠΊΡΠΌΡΠ»ΡΡΠΎΡΠΎΠ² Ρ ΡΠ΅ΠΏΠ»ΠΎΠ°ΠΊΠΊΡΠΌΡΠ»ΠΈΡΡΡΡΠΈΠΌ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠΌ Π² Π²ΠΈΠ΄Π΅ Π²ΡΡΠΎΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΡ
ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΠΏΠ»ΠΎΠ½ΠΎΡΠΈΡΠ΅Π»Π΅ΠΉ (ΠΠΠ’) Π² ΠΊΠΎΠΌΠ±ΠΈΠ½Π°ΡΠΈΠΈ Ρ Π΄ΡΡΠ³ΠΈΠΌΠΈ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ°ΠΌΠΈ ΡΠ΅ΠΏΠ»ΠΎΡΡ Π΄Π»Ρ ΠΏΠΎΠΊΡΡΡΠΈΡ ΠΏΠΈΠΊΠΎΠ²ΡΡ
Π½Π°Π³ΡΡΠ·ΠΎΠΊ.=The article considers the problem of leveling the night gap in the use of electricity using heat storage heat supply systems that use electricity as a source of heat. Solutions using heat accumulators with heat-accumulating material in the form of high-temperature organic heat transfer fluids (BOT) in combination with other heat sources to cover peak loads are proposed
Using Heat Batteries for Electrical Systems Heat Supplies
Π‘Π΅ΠΊΡΠΈΡ V : ΠΠ½Π΅ΡΠ³ΠΎΡΠ΅ΡΡΡΡΠΎΡΠ±Π΅ΡΠ΅Π³Π°ΡΡΠΈΠ΅ ΠΈ ΠΏΡΠΈΡΠΎΠ΄ΠΎΠΎΡ
ΡΠ°Π½Π½ΡΠ΅ ΠΈΠ½Π½ΠΎΠ²Π°ΡΠΈΠΎΠ½Π½ΡΠ΅ ΡΠ΅ΡΠ΅Π½ΠΈΡ Π² ΠΈΠ½ΠΆΠ΅Π½Π΅ΡΠ½ΡΡ
ΡΠΈΡΡΠ΅ΠΌΠ°Ρ
Π·Π΄Π°Π½ΠΈΠΉ ΠΈ ΡΠΎΠΎΡΡΠΆΠ΅Π½ΠΈΠΉΠ ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Π° ΠΏΡΠΎΠ±Π»Π΅ΠΌΠ° Π²ΡΡΠ°Π²Π½ΠΈΠ²Π°Π½ΠΈΡ Π½ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ²Π°Π»Π° Π² ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠΈ ΡΠ»Π΅ΠΊΡΡΠΎΡΠ½Π΅ΡΠ³ΠΈΠΈ ΠΏΡΠΈ ΠΏΠΎΠΌΠΎΡΠΈ ΡΠ΅ΠΏΠ»ΠΎΠ°ΠΊΠΊΡΠΌΡΠ»ΡΡΠΈΠΎΠ½Π½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ ΡΠ΅ΠΏΠ»ΠΎΡΠ½Π°Π±ΠΆΠ΅Π½ΠΈΡ, ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΡΡΠΈΡ
ΡΠ»Π΅ΠΊΡΡΠΎΡΠ½Π΅ΡΠ³ΠΈΡ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ° ΡΠ΅ΠΏΠ»ΠΎΡΡ. ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Ρ ΡΠ΅ΡΠ΅Π½ΠΈΡ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠ΅ΠΏΠ»ΠΎΠ²ΡΡ
Π°ΠΊΠΊΡΠΌΡΠ»ΡΡΠΎΡΠΎΠ² Ρ ΡΠ΅ΠΏΠ»ΠΎΠ°ΠΊΠΊΡΠΌΡΠ»ΠΈΡΡΡΡΠΈΠΌ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠΌ Π² Π²ΠΈΠ΄Π΅ Π²ΡΡΠΎΠΊΠΎΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΠ½ΡΡ
ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΠΏΠ»ΠΎΠ½ΠΎΡΠΈΡΠ΅Π»Π΅ΠΉ (ΠΠΠ’) Π² ΠΊΠΎΠΌΠ±ΠΈΠ½Π°ΡΠΈΠΈ Ρ Π΄ΡΡΠ³ΠΈΠΌΠΈ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠ°ΠΌΠΈ ΡΠ΅ΠΏΠ»ΠΎΡΡ Π΄Π»Ρ ΠΏΠΎΠΊΡΡΡΠΈΡ ΠΏΠΈΠΊΠΎΠ²ΡΡ
Π½Π°Π³ΡΡΠ·ΠΎΠΊ.=The article considers the problem of leveling the night gap in the use of electricity using heat storage heat supply systems that use electricity as a source of heat. Solutions using heat accumulators with heat-accumulating material in the form of high-temperature organic heat transfer fluids (BOT) in combination with other heat sources to cover peak loads are proposed
Preliminary Results from Integrating Compton Photon Polarimetry in Hall A of Jefferson Lab
A wide range of nucleon and nuclear structure experiments in Jefferson Lab's
Hall A require precise, continuous measurements of the polarization of the
electron beam. In our Compton polarimeter, electrons are scattered off photons
in a Fabry-Perot cavity; by measuring an asymmetry in the integrated signal of
the scattered photons detected in a GSO crystal, we can make non-invasive,
continuous measurements of the beam polarization. Our goal is to achieve 1%
statistical error within two hours of running. We discuss the design and
commissioning of an upgrade to this apparatus, and report preliminary results
for experiments conducted at beam energies from 3.5 to 5.9 GeV and photon rates
from 5 to 100 kHz.Comment: 6 pages, 7 figures. To appear in the Proceedings of the International
Nuclear Physics Conference (INPC 2010), July 4-9 2010, Vancouver, Canada
(Journal of Physics: Conference Series
Visual and molecular serologic diagnosis of sarcocystosis in cattle
The purpose of the research is to provide a comparative assessment of efficacy of different diagnostic methods for sarcocystosis in cattle.Materials and methods. Seventy-eight bovine carcasses were examined using methods and regulations of veterinary and sanitary examination. Muscles of the esophagus and other parts of the carcass as well as the spleen, lungs, the liver, and kidneys were examined. The compressor research method was used. A total of 156 compressoria from 78 bovine carcasses were analyzed for tissue sarcocystosis. For life-time diagnostics of bovine sarcocystosis, a molecular serologic method (ELISA) was used that was developed based on antibody detection principles.Results and discussion. Two diagnostic methods, visual inspection and compressor microscopy, identified 13 out of 78 carcasses with Sarcocystis species, which was 16.6%. The number of sarcocystosis animals increased by another 23 cases when studying blood sera from the cattle using ELISA. Thus, we found 36 animals suffering from sarcocystosis out of 78 examined, which was 46%, with tests based on different principles
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