Abstract
We have measured a current emission density of 36 A-cm-2 over an 11.4-cm2-area Lead-Titanate-Zirconate (PZT) ferroelectric cathode with a pulsed anode-cathode (A-K) potential of 50 kV. We have also observed currents above those predicted by classical Child-Langmuir formula for a wide variety of cases. Since a plasma within the A-K gap could also lead to increase current emission we are attempting to measure the properties of the plasma near the cathode surface at emission time. In other measurements, we have observed strong gap currents in the absence of an A-K potential. Further, we continue to make brightness measurements of the emitted beam and observe spatially non-uniform emission and large shot-to-shot variation. Measurements show individual beamlets with a brightness as high 1011 A m-2 rad-2.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of the IEEE Particle Accelerator Conference |
| Place of Publication | Piscataway, NJ, United States |
| Publisher | IEEE |
| Pages | 899-901 |
| Number of pages | 3 |
| Volume | 2 |
| State | Published - 1995 |
| Externally published | Yes |
| Event | Proceedings of the 1995 16th Particle Accelerator Conference. Part 2 (of 5) - Dallas, TX, USA Duration: May 1 1995 → May 5 1995 |
Other
| Other | Proceedings of the 1995 16th Particle Accelerator Conference. Part 2 (of 5) |
|---|---|
| City | Dallas, TX, USA |
| Period | 5/1/95 → 5/5/95 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
Emission, plasma formation, and brightness of a PZT ferroelectric cathode. / Sampayan, S.; Caporaso, George J; Trimble, D.; Westenskow, G.
Proceedings of the IEEE Particle Accelerator Conference. Vol. 2 Piscataway, NJ, United States : IEEE, 1995. p. 899-901.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Emission, plasma formation, and brightness of a PZT ferroelectric cathode
AU - Sampayan, S.
AU - Caporaso, George J
AU - Trimble, D.
AU - Westenskow, G.
PY - 1995
Y1 - 1995
N2 - We have measured a current emission density of 36 A-cm-2 over an 11.4-cm2-area Lead-Titanate-Zirconate (PZT) ferroelectric cathode with a pulsed anode-cathode (A-K) potential of 50 kV. We have also observed currents above those predicted by classical Child-Langmuir formula for a wide variety of cases. Since a plasma within the A-K gap could also lead to increase current emission we are attempting to measure the properties of the plasma near the cathode surface at emission time. In other measurements, we have observed strong gap currents in the absence of an A-K potential. Further, we continue to make brightness measurements of the emitted beam and observe spatially non-uniform emission and large shot-to-shot variation. Measurements show individual beamlets with a brightness as high 1011 A m-2 rad-2.
AB - We have measured a current emission density of 36 A-cm-2 over an 11.4-cm2-area Lead-Titanate-Zirconate (PZT) ferroelectric cathode with a pulsed anode-cathode (A-K) potential of 50 kV. We have also observed currents above those predicted by classical Child-Langmuir formula for a wide variety of cases. Since a plasma within the A-K gap could also lead to increase current emission we are attempting to measure the properties of the plasma near the cathode surface at emission time. In other measurements, we have observed strong gap currents in the absence of an A-K potential. Further, we continue to make brightness measurements of the emitted beam and observe spatially non-uniform emission and large shot-to-shot variation. Measurements show individual beamlets with a brightness as high 1011 A m-2 rad-2.
UR - http://www.scopus.com/inward/record.url?scp=0029458337&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029458337&partnerID=8YFLogxK
M3 - Conference contribution
VL - 2
SP - 899
EP - 901
BT - Proceedings of the IEEE Particle Accelerator Conference
PB - IEEE
CY - Piscataway, NJ, United States
ER -