Professor Drake teaches and pursues research in laboratory,
... Michigan. His current research emphasizes the application
of experimental facilities that produce high energy densities
to the simulation of astrophysical and space phenomena.
His Ph.D from Johns Hopkins in 1979 was based on work
in plasma spectroscopy. He worked at the Lawrence
Livermore Laboratory ...
... The solar wind. It generates an immense sheet of electrical current that spirals like a
ballerina's skirt as the Sun rotates.
The Sun and all the other stars in our galaxy, and colossal exploding jets from distant
Hannes Alfvén (1908-1995), a Swedish physicist, is the father of modern ...
Magnetic field induced transition rates in Ne- and Be
... Be-like In beryllium-like ions, the lowest lying excited state is the metastable state 2s2p 3 P0◦ which for
isotopes with zero nuclear spin, only can decay through higher order transitions where the strongest
one is the E1M1 two-photon transition. The lifetime of the 2s2p 3 P0 level has recently bee ...
... - Photoionize , using laser light near the ionization threshold.
- Diagnostics with applied electric fields.
Space Physics Handout 2 : The Earth`s magnetosphere and
... density in the mid-latitude ionosphere are ~ 105 cm-3 and typical temperatures ~ 103 K, with magnetic field
strengths of the order of 104 nT.
The major fraction of ionisation within the ionosphere is produced by solar X-ray and ultraviolet radiation and
by corpuscular radiation from the Sun. The mos ...
Book 2, Chapter 1 - Magnetism – Quizzes Quiz 1 and 2 – label the
... 6. __________________________________ are the lines that map out the magnetic
field around a magnet.
7. A(n) _________________________________ is any material that attracts iron
and materials that contain iron.
8. The attraction or repulsion between magnetic poles is
Spheromaks, solar prominences, and Alfvén instability of current
... been studied by using a coaxial magnetized plasma gun to inject helicity-bearing plasma into a very large vacuum chamber. The spheromak is formed without a flux conserver and internal λ profiles have been measured.
Spheromak-based technology has been used to make laboratory plasmas having the topolo ...
ppt - Fusion Technology Institute
... Experimental yield of 3.0 MeV protons at 0.8 <
Ed < 2.45 keV, normalized to that at Ed = 2.45
keV. The bare cross-section corresponded to
Bosch and Halle approximation to Ed 2.45 keV
is marked by a solid line. The dashed line is a DDreaction yield =in accordance with a screening
potential value Ue ...
Not to be confused with the spherical tokamak, another topic in fusion research.A spheromak is an arrangement of plasma formed into a toroidal shape similar to a smoke ring. The spheromak contains large internal electric currents and their associated magnetic fields arranged so the magnetohydrodynamic forces within the spheromak are nearly balanced, resulting in long-lived (microsecond) confinement times without external fields. Spheromaks belong to a type of plasma configuration referred to as the compact toroids.The physics of the spheromak and their collisions is similar to a variety of astrophysical events, like coronal loops and filaments, relativistic jets and plasmoids. They are particularly useful for studying magnetic reconnection events, when two or more spheromaks collide. Spheromaks are easy to generate using a ""gun"" that ejects spheromaks off the end of an electrode into a holding area, called the flux conserver. This has made them useful in the laboratory setting, and spheromak guns are relatively common in astrophysics labs. These devices are often, confusingly, referred to simply as ""spheromaks"" as well; the term has two meanings.Spheromaks have been proposed as a magnetic fusion energy concept due to their long confinement times, which was on the same order as the best tokamaks when they were first studied. Although they had some successes during the 1970s and 80s, these small and lower-energy devices had limited performance and most spheromak research ended when fusion funding was dramatically curtailed in the late 1980s. However, in the late 1990s research demonstrated that hotter spheromaks have better confinement times, and this led to a second wave of spheromak machines. Spheromaks have also been used to inject plasma into a bigger magnetic confinement experiment like a tokamak.