Emission, plasma formation, and brightness of a PZT ferroelectric cathode

S. Sampayan; George J Caporaso; D. Trimble; G. Westenskow

Emission, plasma formation, and brightness of a PZT ferroelectric cathode

S. Sampayan, George J Caporaso, D. Trimble, G. Westenskow

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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

ASJC Scopus subject areas

Engineering(all)

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Cite this

@inproceedings{76e372626841471aae3267ab7693bb18,

title = "Emission, plasma formation, and brightness of a PZT ferroelectric cathode",

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.",

author = "S. Sampayan and Caporaso, {George J} and D. Trimble and G. Westenskow",

year = "1995",

language = "English (US)",

volume = "2",

pages = "899--901",

booktitle = "Proceedings of the IEEE Particle Accelerator Conference",

publisher = "IEEE",

note = "Proceedings of the 1995 16th Particle Accelerator Conference. Part 2 (of 5) ; Conference date: 01-05-1995 Through 05-05-1995",

}

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

AN - SCOPUS:0029458337

VL - 2

SP - 899

EP - 901

BT - Proceedings of the IEEE Particle Accelerator Conference

PB - IEEE

CY - Piscataway, NJ, United States

T2 - Proceedings of the 1995 16th Particle Accelerator Conference. Part 2 (of 5)

Y2 - 1 May 1995 through 5 May 1995

ER -