Small size X-pinch radiation source for application to phase-contrast X-ray radiography of biological specimens

Mo x-pinch performance from a new compact and portable 1-kA/ns 2-LTD-Brick driver

“…The current value corresponds to a moment in time when the XRD peak power was observed for each particular x-pinch shot. As can be seen, the predicted "hot spot" radii varies from 3-μm for 2 x 30-μm W xpinches up to 8-μm for 2 x 30-μm Mo x pinches and are in a good agreement with some direct measurements [3] [12] [13].…”

“…The fact that one or more radiation spots are always formed in a predictable location (within the 100-200 μm z-pinch plasma column), in predictable times (with 2-ns jitter), along with its unique x-ray characteristics, make x pinches a better choice in many applications in plasma physics, biology and others, which we briefly referenced in Table 1.2-3. Radiography of wire array z pinches [2] [21] [22] Phase-contrast imaging of soft biological objects [13] [23] [24] [25] Study of CH foams inside wire array z pinches [26] Study of inertial-confinement-fusion capsule shells [27] We summarize some known pulsed-power, high-current x-pinch generators in the "Marx (technology)" in the table above assumes that pulsed-power generators are based on one or more oil-insulated Marx generators, pulse-forming and transmission lines to compress and deliver pulses to x-pinch load, and gas switches. All such pulsed-power systems are able to deliver a large, fast-rising current to a low-inductance, x-pinch load and have, for decades, generated a huge amount of x-pinch research around the world.…”

“…We briefly discussed the lumped RLC circuit with emphasize on "critically matched" and "matched" load cases and derived some useful expressions, which can be used to estimate the driver time to peak (2.2-14), peak current (2.2-15), peak voltage (2.2-16) and current rise time (2.2-17) and (2.2-18). The last, "matched" load case is more suitable for x-pinch driver design, as it gives a higher peak current (see [2][3][4][5][6][7][8][9][10][11][12][13][14][15] with faster current rate of rise (see 2-17 vs. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. We also derived a few expressions (2.2-21), (2.2-22) and (2.2-23) which can be usefull for driver characterization in short-circuit testing.…”

“…Spatial structures as small as 3 μm to 4 μm were observed in this experiment. The central event of the evolution of all x pinches is an almost instantaneous x-ray burst (Figure 1.2-3 and Figure 1.2-4) with pulse duration as small as a few ps (see Table Radiography of wire array z pinches [2] [21] [22] Phase-contrast imaging of soft biological objects [13] [23] [24] [25] Study of CH foams inside wire array z pinches [26] Study of inertial-confinement-fusion capsule shells [27] 1. We summarize some known pulsed-power, high-current x-pinch generators in the Table 1.3-1 below.…”

“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] with the solution plotted in Figure2.2-5.…”