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White Rabbit
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fdf74e3e
Commit
fdf74e3e
authored
Mar 02, 2021
by
Javier Serrano
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wr_be-cem-tm_2021_03.tex
presentations/WR_BE-CEM-TM_2021_03/wr_be-cem-tm_2021_03.tex
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presentations/WR_BE-CEM-TM_2021_03/wr_be-cem-tm_2021_03.tex
View file @
fdf74e3e
...
...
@@ -126,7 +126,7 @@
{
\tiny
Courtesy Greg Kruk
}
\end{frame}
\begin{frame}
{
Beam Coordination Diagram
}
\begin{frame}
{
Beam Coordination Diagram
(BCD)
}
\begin{center}
\includegraphics
[width=\textwidth]
{
gmt/bcd.pdf
}
...
...
@@ -162,9 +162,9 @@
\begin{itemize}
\item
GMT uses PPS and 10 MHz from a GPS Disciplined Oscillator (GPSDO). BST
uses Revolution Frequency and Bunch Clock.
\item
GMT
is RS-485 copper for short distances and fibre for long stretches.
BST is fully based on fibre and uses an encoding/decoding scheme designed
for LHC experiments called TTC.
\item
GMT
uses Manchester encoding over copper (RS-485) for short distances
and fibre for long stretches. BST is fully based on fibre and uses an
encoding/decoding scheme designed
for LHC experiments called TTC.
\end{itemize}
\end{frame}
...
...
@@ -272,12 +272,13 @@
\item
offset from master:
$
OFM
=
t
_{
2
}
-
(
t
_{
1
}
+
\delta
_{
ms
}
)
$
\end{itemize}
\item
<2-> Hierarchical network
\item
<3-> Shortcomings:
\item
<3-> Shortcomings
of traditional PTP
:
\begin{itemize}
\item
devices have free-running oscillators
\item
frequency drift compensation vs. message exchange traffic
\item
frequency drift compensation traffic can compromise determinism of
other messages
\item
assumes symmetry of medium
\item
timestamps resolution
\item
resolution of timestamps
\end{itemize}
\end{itemize}
\end{columns}
...
...
@@ -332,7 +333,7 @@
\column
{
.65
\textwidth
}
\footnotesize
\begin{itemize}
\item
<1->Correction of R
TT
for asymmetries
\item
<1->Correction of R
ound Trip Time (RTT)
for asymmetries
\item
<2->Asymmetry sources: FPGA, PCB, SFP electrics/optics, chromatic dispersion
\item
<3->Link delay model:
\begin{itemize}
\scriptsize
...
...
@@ -372,7 +373,7 @@
\begin{itemize}
\small
\item
Central element of WR network
\item
18 port gigabit Ethernet switch with WR features
\item
Default Optical transceivers: up to 10km, single-mode fib
er
\item
Default Optical transceivers: up to 10km, single-mode fib
re
\item
Fully open, commercially available from 4 companies
\end{itemize}
...
...
@@ -441,7 +442,7 @@
v4.2: 20-24@1
\&
10 Gbps or
\\\vspace
{
-0.1cm
}
\textcolor
{
white
}{
v4.2: 20-
}
20@1Gbps
\&
2-4 @10Gbps
\scriptsize
\item
Interfaces aligned with industry trends
\&
user
s’
needs
\\
\item
Interfaces aligned with industry trends
\&
user needs
\\
\tiny
USB C, mgmt RJ45
\&
SFP, reset, 10MHz/1PPS in/out+Abscal out, LCD
\scriptsize
...
...
@@ -675,7 +676,7 @@ ISPCS keynote \textit{Highly Accurate Time Dissemination \& Network Synchronisat
\begin{center}
\pause\small
WRTD (White Rabbit Trigger Distribution) to replace the trigger system in
the Open Analog Signals Information System (OASIS)
the Open Analog
ue
Signals Information System (OASIS)
\end{center}
\end{frame}
...
...
@@ -695,7 +696,7 @@ ISPCS keynote \textit{Highly Accurate Time Dissemination \& Network Synchronisat
\begin{frame}
{
Fixed-latency data transfer- example application
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{center}
Distribution of magnetic field in CERN accelerator
s
BTrain: distribution of magnetic field in CERN synchrotron
s
\end{center}
\begin{center}
\vspace
{
-0.2cm
}
...
...
@@ -727,7 +728,7 @@ Distribution of magnetic field in CERN accelerators
\begin{itemize}
\footnotesize
\item
RF over WR at European Synchrotron Radiation Facility (ESRF)
\begin{itemize}
\scriptsize
\item
Complete WR-based beam-synchronous timing system in operation:
$
<
$
10 ps jitter
\item
Complete WR-based beam-synchronous timing system in operation:
\\
$
<
$
10 ps jitter
\end{itemize}
\item
RF over WR at CERN
\begin{itemize}
\scriptsize
...
...
@@ -755,7 +756,7 @@ Distribution of magnetic field in CERN accelerators
\end{block}
\end{frame}
\begin{frame}
{
The White Rabbit ecosystem
1
/2
}
\begin{frame}
{
The White Rabbit ecosystem
2
/2
}
\begin{block}
{
Challenges ahead
}
\begin{itemize}
\item
How to maintain a healthy ever-expanding open core? The issue with
...
...
@@ -777,11 +778,11 @@ Distribution of magnetic field in CERN accelerators
\begin{itemize}
\item
<1-> Sub-ns accuracy and sub-10~ps precision out-of-the-box
\item
<2-> Sub-10~ps accuracy and sub-100~fs precision achievable
\item
<3-> Completely open source
\item
<3-> Completely open source
, very versatile
\item
<4-> Commercially available off-the-shelf
\item
<5-> Standard-based and standard extending
\item
<6-> Included in the revised IEEE1588
\item
<7-> Showcase of technology transfer
\item
<7-> Showcase of
knowledge and
technology transfer
% \item<8-> A versatile solution for general control and data acquisition
% \item<1-> Sub-ns accuracy and sub-10ps precision out-of-the-box
...
...
@@ -803,7 +804,8 @@ Distribution of magnetic field in CERN accelerators
%\vspace{1cm}
\begin{center}
\scriptsize
WR Project page: http://www.ohwr.org/projects/white-rabbit/wiki
WR Project page:
\href
{
http://www.ohwr.org/projects/white-rabbit/wiki
}{
http://www.ohwr.org/projects/white-rabbit/wiki
}
\end{center}
\end{frame}
...
...
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