Pulse length measurements of ultra cold and ultrafast electron bunches extracted from a laser cooled gas

Research output: Contribution to conferencePosterAcademic

Abstract

We are developing an ultrafast and ultracold electron source, based on near-threshold, femtosecond photoionization of laser-cooled and trapped Rubidium gas. Recently, we demonstrated electron crystallography of graphite for the first time using the ul- tracold source. The ultimate goal is ultrafast, single-shot electron crystallography of macromolecules, which requires a high degree of control of the dense electron phase space distribution. The transverse phase space distribution was characterized using the waistscan method and yielded electron temperatures as low as 10 K. For char- acterizing the longitudinal phase space distribution we have developed a microwave cavity based diagnostic element to correlate electron bunch lengths to streak images. This allows us to measure the pulse length with sub picosecond temporal resolution. We present the first measurements of both ultracold and ultrafast electron pulses which have an rms pulse duration of 20 picoseconds containing at least 1000 elec- trons. These bunches are sufficiently short to be compressed to 100 fs bunch lengths using established RF compression techniques.

Conference

ConferenceColdbeams 2017
CountryNetherlands
CityEindhoven
Period10/07/1712/07/17
Internet address

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pulses
gases
lasers
electrons
crystallography
electron sources
rubidium
temporal resolution
macromolecules
shot
photoionization
pulse duration
graphite
electron energy
microwaves
cavities
thresholds

Cite this

@conference{32688bcb70294d2382d99228f950f90e,
title = "Pulse length measurements of ultra cold and ultrafast electron bunches extracted from a laser cooled gas",
abstract = "We are developing an ultrafast and ultracold electron source, based on near-threshold, femtosecond photoionization of laser-cooled and trapped Rubidium gas. Recently, we demonstrated electron crystallography of graphite for the first time using the ul- tracold source. The ultimate goal is ultrafast, single-shot electron crystallography of macromolecules, which requires a high degree of control of the dense electron phase space distribution. The transverse phase space distribution was characterized using the waistscan method and yielded electron temperatures as low as 10 K. For char- acterizing the longitudinal phase space distribution we have developed a microwave cavity based diagnostic element to correlate electron bunch lengths to streak images. This allows us to measure the pulse length with sub picosecond temporal resolution. We present the first measurements of both ultracold and ultrafast electron pulses which have an rms pulse duration of 20 picoseconds containing at least 1000 elec- trons. These bunches are sufficiently short to be compressed to 100 fs bunch lengths using established RF compression techniques.",
author = "J.G.H. Franssen and E.J.D. Vredenbregt and O.J. Luiten",
year = "2017",
month = "7",
day = "10",
language = "English",
pages = "65",
note = "null ; Conference date: 10-07-2017 Through 12-07-2017",
url = "http://www.coldbeams2017.nl",

}

Pulse length measurements of ultra cold and ultrafast electron bunches extracted from a laser cooled gas. / Franssen, J.G.H.; Vredenbregt, E.J.D.; Luiten, O.J.

2017. 65 Poster session presented at Coldbeams 2017, Eindhoven, Netherlands.

Research output: Contribution to conferencePosterAcademic

TY - CONF

T1 - Pulse length measurements of ultra cold and ultrafast electron bunches extracted from a laser cooled gas

AU - Franssen,J.G.H.

AU - Vredenbregt,E.J.D.

AU - Luiten,O.J.

PY - 2017/7/10

Y1 - 2017/7/10

N2 - We are developing an ultrafast and ultracold electron source, based on near-threshold, femtosecond photoionization of laser-cooled and trapped Rubidium gas. Recently, we demonstrated electron crystallography of graphite for the first time using the ul- tracold source. The ultimate goal is ultrafast, single-shot electron crystallography of macromolecules, which requires a high degree of control of the dense electron phase space distribution. The transverse phase space distribution was characterized using the waistscan method and yielded electron temperatures as low as 10 K. For char- acterizing the longitudinal phase space distribution we have developed a microwave cavity based diagnostic element to correlate electron bunch lengths to streak images. This allows us to measure the pulse length with sub picosecond temporal resolution. We present the first measurements of both ultracold and ultrafast electron pulses which have an rms pulse duration of 20 picoseconds containing at least 1000 elec- trons. These bunches are sufficiently short to be compressed to 100 fs bunch lengths using established RF compression techniques.

AB - We are developing an ultrafast and ultracold electron source, based on near-threshold, femtosecond photoionization of laser-cooled and trapped Rubidium gas. Recently, we demonstrated electron crystallography of graphite for the first time using the ul- tracold source. The ultimate goal is ultrafast, single-shot electron crystallography of macromolecules, which requires a high degree of control of the dense electron phase space distribution. The transverse phase space distribution was characterized using the waistscan method and yielded electron temperatures as low as 10 K. For char- acterizing the longitudinal phase space distribution we have developed a microwave cavity based diagnostic element to correlate electron bunch lengths to streak images. This allows us to measure the pulse length with sub picosecond temporal resolution. We present the first measurements of both ultracold and ultrafast electron pulses which have an rms pulse duration of 20 picoseconds containing at least 1000 elec- trons. These bunches are sufficiently short to be compressed to 100 fs bunch lengths using established RF compression techniques.

M3 - Poster

SP - 65

ER -