GEO600 Gravitational-wave Detector

GEO600 Diary

Building and operating a gravitational-wave detector

Since September 1995 we have been building and operating the British-German gravitational-wave detector. These pages show how GEO600 has been developing over the years. Here you find current pictures from the detector site and information from our labs.

September 2024

September 2024

Improving GEO600's beam splitter thermal compensation system [more]

June 2023

June 2023

Understanding, modelling, and mitigating noise from light scattered back into GEO600’s squeezed-light source [more]

January 2023

January 2023

First neural-network sensing and control in a gravitational-wave detector: GEO600 scientists demonstrate first-ever successful implementation [more]

March 2022

March 2022

O3GK publication on arXiv [more]

December 2021

December 2021

GEO600 helps searching for Dark Matter [more]

June 2021

June 2021

Repairing the east arm vacuum system [more]

April 2021

April 2021

The GEO600 laser system has been in operation for 10 years [more]

January 2021

January 2021

GEO600 reaches 6 dB of squeezing [more]

April 2020

April 2020

GEO600 and KAGRA join forces for test observation run [more]

March 2020

March 2020

Suspension of O3 [more]

October 2019

October 2019

Repairing the vacuum system with pure nitrogen [more]

April 2019 - O3 begins

April 2019 - O3 begins

O3 begins [more]

January 2019

January 2019

Lower Saxony Science Minister visits GEO600 [more]

December 2018

December 2018

The vacuum leak causes problems yet again [more]

December 2018

December 2018

Almost 6 dB of squeezing in GEO600 [more]

August 2017

August 2017

A vacuum leak in the north arm [more]

January 2017

January 2017

Lower Saxony Prime Minister visits GEO600 [more]

November 2016

November 2016

Advanced LIGO detectors begin second observation run “O2” [more]

February 2016

February 2016

Direct detection of gravitational waves [more]

September 2015

September 2015

Advanced LIGO detectors begin first observation run [more]

2015

2015

Spatially resolved heating of the GEO600 beam-splitter [more]

2014

2014

Towards a darker dark port [more]

2013

2013

One year of squeezing [more]

2012

2012

Preparations for laser power increase [more]

2011

2011

Joint GEO600 Virgo run [more]

2010

2010

Let the squeezing begin! [more]

July 2009

July 2009

Start of S6/VSR2 [more]

2008

2008

Astrowatch [more]

February 2007

February 2007

Maintenance and repairs [more]

May 2006

May 2006

GEO600 joins the S5 science run [more]

2005

2005

Fourth Science Run “S4” [more]

2004

2004

Upgrade of the detector [more]

2003

2003

Two science runs [more]

2002

2002

Improvement of the GEO sensitivity and S1 [more]

January/February 2001

January/February 2001

Optical components and their suspensions [more]

2000

2000

Getting closer to a working detector [more]

1999

1999

Hardware installations on the site [more]

1998

1998

Vacuum system and EXPO 2000 [more]

1997

1997

Vacuum tubes and the cleanroom [more]

1996

1996

First buildings and the arm trenches [more]

1995

1995

Breaking the ground for gravitational waves [more]