White Rabbit News
White Rabbit
Workshop 14-16 March in Amsterdam
The Ninth White Rabbit Workshop will be held in Amsterdam from 14 to 16
March 2016 and is organized by NIKHEF.
If you’re interested in meeting the developers and users, please find
everything about it on the Ninth White Rabbit
Workshop
page.
Note that the no fees are charged.
White Rabbit
15-12-15: Pickin’ up good vibrations in CERN Bulletin
In preparation for the civil engineering work on the HL-LHC at CERN,
vibration measurements were carried out at the LHC’s Point 1 last month.
These measurements help evaluate how civil engineering work could impact
the beam, and will provide crucial details about the site’s geological
make-up before construction begins.
…
Geophone sensors to measure vibrations in the ground were placed around
the vibration sources at the surface, linked to the underground
geophones using the LHC “White Rabbit” synchronisation network. This
allowed the team to look at the effects of the vibrations at the same
time.
White Rabbit
07-12-2015: WR in deep sea: 3500m depth, 100km off coast
On 3 December 2015 a first line with 18 Digital Optical
Modules, each one containing a
White Rabbit PTP Core -
WRPC, was
deployed successfully and communicated over 100 Km of fiber with the
shore station.
This installation is 100 km into the sea off the coast of Italy at 3500
meter depth and must be the weirdest and harshest place to install WR
nodes.
This is a first step in the installation of
KM3NET, a European deep-sea research
infrastructure hosting a neutrino telescope.
White Rabbit
12-11-2015: WR used in seismic measurements
CERN is trying to decide whether they can start Civil Engineering for the Hi-Luminosity project while the beam is on. The alignment of magnets is very delicate in the LHC and very slight variations thereof can produce beam instabilities. This is important because the potential impact on the overall schedule is big. The CERN EN-MME group has teamed up with the city of Geneva to have a shaker truck shake the ground and feel the impact down in the pit at point 1 (ATLAS), so as to have an indication of what to expect during real civil engineering work. The excitation and the sensors are separated by a few hundred meters, and they need to be synchronized, which is why they requested a WR link.
White Rabbit
12-06-2015: first beam with WR based timing system at GSI
GSI in Germany reported that for
the first time there is a beam in the injector of CRYRING at GSI
controlled by a White Rabbit based timing system.
The White Rabbit system controls the beam chopper of the CRYRING linac
section YRLE
“[1]":https://www-acc.gsi.de/wikis/Timing/TimingSystemGroupsAndMachines#CRYRING
and triggers the data acquisition of beam instrumentation to detect the
signal of the pulsed beam after the chopper
“[2]":https://www-acc.gsi.de/wikis/pub/Timing/WebHome/YRT1DC2_2015-06-09_16-28-26.049.png.
White Rabbit
VLBI Workshop presentations available
The Third International VLBI Technology
Workshop featured four presentations (out
of 55) with White Rabbit.
These workshops, which evolved from the highly successful 10-year series
of International e-VLBI workshops, aim to encompass all areas of
hardware or software development relevant to VLBI.
White Rabbit
7-5-2015: article in Xcell Journal
The Xcell Journal from Xilinx features a nice article giving an 8-page
introduction to the technology.
White Rabbit: When Every Second Counts, Xcell
Journal,
Issue 91, Q2 2015.
The article is written by Seven Solutions.
White Rabbit
7-11-2014: ITSF 2014 “Time for the Future”
The future of synchronization - white elephant or white rabbit is the title of a presentation at the International Telecom Sync Forum - ITSF 2014.
This paper considers new requirements and new High Accuracy technology available for Telecoms synchronization. Also a look at distributed applications ready to utilize high accuracy sync. And considers why a technology of the past is still the bases of time standardization efforts for the future? What sort of transition and inter-operation scenarios are possible? Is the white rabbit too early or too late?