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The neutral hydrogen atoms in the Universe radiates with a wavelength of 21 cm, on large scales the intensity of this radiation is proportional to the matter density. By radio observation, one can probe the cosmic large scale structure distribution. Using the baryon acoustic oscillation signatures in the matter power spectrum as standard rulers, high precision cosmological measurements can be obtained, and the dark energy equation of state parameter w measured. This provides an important tool for dark energy observation.
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The Tianlai project is an experiment aimed at detecting dark energy by measuring the baryon acoustic oscillation (BAO) features in the large scale structure power spectrum, which can be used as a standard ruler. The basic plan is to build a radio telescope array, and use it to make 21cm intensity mapping observations of the neutral hydrogen which traces out the large scale structure of matter distribution.
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Currently, the Tianlai collaboration includes scientists and engineers from China, Canada, France, and USA.
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The word “Tianlai” literally means “heavenly sound”, it was coined by the ancient philosopher Zhuangzi (or Chuang Tzu, 369BCE-286BCE) .
  
  
 
== Getting started ==
 
== Getting started ==
  
<font color=red>This wiki is only available for members of TianLai. If you need the member account, please email to our manager(Mr. Zhang):zhang_juyong01@163.com</font>
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<font color=red>This wiki is only available for members of TianLai. If you need the member account, please email to our manager(Fengquan Wu):wufq@bao.ac.cn</font>
  
 
* [//www.mediawiki.org/wiki/Manual:Configuration_settings Configuration settings list]
 
* [//www.mediawiki.org/wiki/Manual:Configuration_settings Configuration settings list]
 
* [//www.mediawiki.org/wiki/Manual:FAQ MediaWiki FAQ]
 
* [//www.mediawiki.org/wiki/Manual:FAQ MediaWiki FAQ]
 
* [https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list]
 
* [https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list]
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== Telecons and Hacksessions ==
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* [https://indico.fnal.gov/event/17652/ Fermilab Indico Site ('live broadcast' links to Zoom)] for monthly collaboration telecons, monthly Tianlai Analysis Center (TAC) telecons, and (roughly) monthly TAC Hacksessions face-to-face, usually no telecon).
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* [https://uwprod-my.sharepoint.com/:w:/g/personal/pttimbie_wisc_edu/EXy3zYPWB8VLtB5X4BUMWW0BipR5HoB2t2QXsvUvPg_tcg?e=0j17To Agendas and notes from Tianlai Analysis Center hacksessions] Roughly once/month at Fermilab or Wisconsin. (This link is to an editable Microsoft Office document.  Let Peter know if it doesn't work.)
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* [https://indico.lal.in2p3.fr/event/3450/ LAL Indico Site with archived telecon notes through July 2017]
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== Data Logs ==
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* [[Log:_Observation_Data_with_32chn_IA_Correlator]]
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* [[Log:_Observation_Data_with_192chn_IA_Correlator]]
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* [[Log:_Tianlai_Instruments_Maintenance]]
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* [[Log:_Power_Operation_of_Devices_in_Antenna_Area]]
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== Data Commentary ==
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* [[Fermilab Data Overview]]
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* [http://tianlai.bao.ac.cn/wiki/index.php/Data_201605-06 Data_201605-06 (1st data shipment)]
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* [http://tianlai.bao.ac.cn/wiki/index.php/Data_201605-06_(NP_Data) Data_201605-06 (only NP) (1st data shipment)]
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* [http://tianlai.bao.ac.cn/wiki/index.php/Data_2018 2018 Data]
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* [http://tianlai.bao.ac.cn/wiki/index.php/Blorder Baseline list]
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== Analysis and Software ==
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* [[Tianlai Pipeline (Zuo Shifan's python code)]]
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* [[Understanding The Python pypeline]]
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* [[Document_Tlpipe]]
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* [[Marriner Notes]]
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* [[Software packages Installed in tianlai01.fnal.gov]]
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* [http://cmb.physics.wisc.edu/tianlai/Quicklook/ Albert's 'quicklook' waterfall plots of NCP data from May, 2016]
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* [[Fermilab Data Overview]]
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* [[Tianlai Analysis Center]]
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== Dish Antennas and Beam Patterns ==
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* [[Dish Feeds]]
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* [[Dish Antenna Simulations]]
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* [[Dish Antenna Beam Measurements from Astronomical Sources]]
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* [[Drone Beam Measurements]]
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[[File:dish_configure.png|thumb|200px|Tianlai Dish Array]]
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== Cylinder Antennas and Beam Patterns ==
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== Presentations and Papers ==
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* [[Talks]] about Tianlai
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* [[Publications about Tianlai]].  Some editable files are in [[Papers]].
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* [[Posters]] - coming soon
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* [[General Papers]] about 21 cm science
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== Proposals ==
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* [[Observing Proposals]]
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* [[Funding Proposals]] - coming soon
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== References ==
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* [[Papers about Radio Telescope Calibration, Beams, etc.]]

Latest revision as of 10:37, 2 October 2019

The TianLai Project -- A Radio Observation Experiment for Dark Energy


The Tianlai project is an experiment aimed at detecting dark energy by measuring the baryon acoustic oscillation (BAO) features in the large scale structure power spectrum, which can be used as a standard ruler. The basic plan is to build a radio telescope array, and use it to make 21cm intensity mapping observations of the neutral hydrogen which traces out the large scale structure of matter distribution.

Currently, the Tianlai collaboration includes scientists and engineers from China, Canada, France, and USA.

The word “Tianlai” literally means “heavenly sound”, it was coined by the ancient philosopher Zhuangzi (or Chuang Tzu, 369BCE-286BCE) .


Contents

[edit] Getting started

This wiki is only available for members of TianLai. If you need the member account, please email to our manager(Fengquan Wu):wufq@bao.ac.cn

[edit] Telecons and Hacksessions


[edit] Data Logs

[edit] Data Commentary

[edit] Analysis and Software

[edit] Dish Antennas and Beam Patterns

Tianlai Dish Array

[edit] Cylinder Antennas and Beam Patterns

[edit] Presentations and Papers

[edit] Proposals

[edit] References

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