How to make this chapter heading style?

Question

As fncychap has no such chapter style, and using the memoir class will cause a lot conflicts with my current settings (book class), how to make this style (perhaps using the titlesec package)?

1. title style for table of contetns, Nomenclature, References, etc
2. title style for chapters

Answer 1

One option using TikZ (a TikZ-free solution is provided below); adjust the font attributes and lengths according to your needs:

\documentclass{book}
\usepackage{lmodern}
\usepackage{titlesec}
\usepackage{microtype}
\usepackage{tikz}

\definecolor{myblue}{RGB}{0,82,155}

\titleformat{\chapter}[display]
  {\normalfont\bfseries\color{myblue}}
  {\filleft%
    \begin{tikzpicture}
    \node[
      outer sep=0pt,
      text width=2.5cm,
      minimum height=3cm,
      fill=myblue,
      font=\color{white}\fontsize{80}{90}\selectfont,
      align=center
      ] (num) {\thechapter};
    \node[
      rotate=90,
      anchor=south,
      font=\color{black}\Large\normalfont
      ] at ([xshift=-5pt]num.west) {\textls[180]{\textsc{\chaptertitlename}}};  
    \end{tikzpicture}%
  }
  {10pt}
  {\titlerule[2.5pt]\vskip3pt\titlerule\vskip4pt\LARGE\sffamily}

\begin{document}

\tableofcontents
\chapter{Betratronic motion in a synchrotron}

\end{document}

An unnumbered chapter:

A numbered chapter:

A TikZ-free option:

\documentclass{book}
\usepackage{lmodern}
\usepackage{graphicx}
\usepackage{xcolor}
\usepackage{titlesec}
\usepackage{microtype}

\definecolor{myblue}{RGB}{0,82,155}

\titleformat{\chapter}[display]
  {\normalfont\bfseries\color{myblue}}
  {\filleft\hspace*{-60pt}%
    \rotatebox[origin=c]{90}{%
      \normalfont\color{black}\Large%
        \textls[180]{\textsc{\chaptertitlename}}%
    }\hspace{10pt}%
    {\setlength\fboxsep{0pt}%
    \colorbox{myblue}{\parbox[c][3cm][c]{2.5cm}{%
      \centering\color{white}\fontsize{80}{90}\selectfont\thechapter}%
    }}%
  }
  {10pt}
  {\titlerule[2.5pt]\vskip3pt\titlerule\vskip4pt\LARGE\sffamily}

\begin{document}

\tableofcontents
\chapter{Betratronic motion in a synchrotron}

\end{document}

An unnumbered chapter:

A numbered chapter:

Some remarks:

• The titlesec package was used to easily change the formatting for chapter headings.

• The microtype package was used to use \textls to space out the letters in "Chapter".

• The lmodern package was used just to have access to a 80pt font size.

• I used TikZ in the first solution to quickly place some of the elements; the second option is a TikZ-free solution.