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Location & approach

By car

The campus of the Technical University of Dortmund is located near the freeway junction Dortmund West, where the Sauerland line A45 crosses the Ruhr expressway B1/A40. The Dortmund-Eichlinghofen exit on the A45 leads to the South Campus, the Dortmund-Dorstfeld exit on the A40 leads to the North Campus. The university is signposted at both exits.

By bus and train

The "Dortmund Universität" S-Bahn station is located directly on the North Campus. From there, the S-Bahn line S1 runs every 15 or 30 minutes to Dortmund main station and in the opposite direction to Düsseldorf main station via Bochum, Essen and Duisburg. In addition, the university can be reached by bus lines 445, 447 and 462. Timetable information can be found on the homepage of the Rhine-Ruhr Transport Association, and DSW21 also offer an interactive route network map.

Translated with www.DeepL.com/Translator (free version)

By H-Bahn

One of the landmarks of the TU Dortmund is the H-Bahn. Line 1 runs every 10 minutes between Dortmund Eichlinghofen and the Technology Center via Campus South and Dortmund University S, while Line 2 commutes every 5 minutes between Campus North and Campus South. It covers this distance in two minutes.

By plane

From Dortmund Airport, the AirportExpress takes just over 20 minutes to Dortmund Central Station and from there the S-Bahn (suburban train) takes you to the university. A wider range of international flight connections is offered by Düsseldorf Airport, about 60 kilometers away, which can be reached directly by S-Bahn from the university's train station.

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Cafeteria menus

To overview

Location & approach

By car

The campus of the Technical University of Dortmund is located near the freeway junction Dortmund West, where the Sauerland line A45 crosses the Ruhr expressway B1/A40. The Dortmund-Eichlinghofen exit on the A45 leads to the South Campus, the Dortmund-Dorstfeld exit on the A40 leads to the North Campus. The university is signposted at both exits.

By bus and train

The "Dortmund Universität" S-Bahn station is located directly on the North Campus. From there, the S-Bahn line S1 runs every 15 or 30 minutes to Dortmund main station and in the opposite direction to Düsseldorf main station via Bochum, Essen and Duisburg. In addition, the university can be reached by bus lines 445, 447 and 462. Timetable information can be found on the homepage of the Rhine-Ruhr Transport Association, and DSW21 also offer an interactive route network map.

Translated with www.DeepL.com/Translator (free version)

By H-Bahn

One of the landmarks of the TU Dortmund is the H-Bahn. Line 1 runs every 10 minutes between Dortmund Eichlinghofen and the Technology Center via Campus South and Dortmund University S, while Line 2 commutes every 5 minutes between Campus North and Campus South. It covers this distance in two minutes.

By plane

From Dortmund Airport, the AirportExpress takes just over 20 minutes to Dortmund Central Station and from there the S-Bahn (suburban train) takes you to the university. A wider range of international flight connections is offered by Düsseldorf Airport, about 60 kilometers away, which can be reached directly by S-Bahn from the university's train station.

ServicePortal UniMail

Worldwide first EEHG implementation at a storage ring

09/17/2022

EEHG (echo-enabled harmonic generation) is a scheme proposed in 2009 [1]. Using two laser pulses, electron bunches in accelerator facilities are manipulated such that ultrashort pulses of synchrotron radiation are generated at short wavelengths.

EEHG has been demonstrated already at linear accelerators, e.g., at FERMI in Italy [2]. The scheme has also been proposed for storage rings, in particular for BESSY/Germany [3], DELTA/Germany [4], HLS/China [5], NSLS-II/USA [6] and SOLEIL/France [7], but was realized only recently. Im summer 2022, the electromagnets of the undulator U250 at DELTA were rewired for the EEHG configuration:

modulator-chicane-modulator-chicane-radiator.

A modulator is an undulator in which laser pulses modulate the electron energy. In a chicane, magnets are arranged such that the electrons are longitudinally shifted according to their energy. A radiator is an undulator from which synchrotron radiation is emitted.

Remodeling the undulator U250 required almost 200 new wires. The whole undulator is now driven by 14 separate power supplies. With 72 copper bars on three switch boards (in the photo below the magnets), the U250 can be reconfigured as a normal undulator in a short time.

First experiments since September 2022 demonstrated the synchronized interaction of the electrons with two laser pulses [8]. While normal synchrotron radiation pulses have a duration of 100 picoseconds, the length of the laser pulses is only 50 femtoseconds, a factor of 2000 shorter. This is also the duration of the radiation pulses generated by EEHG.

Undulator U250, bestehend aus zahlreichen Elektromagneten im Kupferspulen und schwarzen Anschlüssen für Kühlwasser. — Rewired undulator U250

Graph of magnetic field as function of position along the undulator U250 — Magnetic field along the undulator U250

G. Stupakov, Physical Review Letters 102, 074801 (2009).
P. Rebernik Ribič et al, Nature Photonics 13, 555 (2019).
J.-G. Hwang et al, Scientific Reports 10, 10093 (2020).
S. Khan et al, Synchrotron Radiation News 24:5, 18 (2011).
H. Li et al, Proceedings of IPAC'13, Shanghai, China, 1208 (2013).
X. Yang et al, Scientific Reports 12, 9437 (2022).
C. Evain et al, New Journal of Physics 14, 023003 (2012).
S. Khan et al, Proceedings of IPAC'23, Venice, Italy, 1039 (2023).